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Kau)))

@carbon8.bsky.social
3.2K followers 415 following 497 posts

birds, geology, isotopes, mindfulness, monsoons, oceans, & weird music.

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Reposted by Kau)))
Mike Henry @onlyveesaz.bsky.social · 24/09/2026
I’m submitting a handful of images for the annual Arizona Highways photography contest. Here’s a few of my favorites from the last year. 🧵
Pyrrhuloxia family atop a Saguaro cactus
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Anya Hess @anya-hess.bsky.social · 24/09/2026
Very excited to announce our paper is out in Science Advances @science.org! Our reconstructions show Pacific Walker Circulation was stronger during the Little Ice Age, consistent with projections of weakening with future warming www.science.org/doi/10.1126/... @whoi.edu @rutgersupress.bsky.social
science.org
A strong Pacific Walker Circulation during the Little Ice Age
Reconstructions of climate over the past millennium provide context for disentangling anthropogenic forcing from natural multidecadal variability. However, the strength of the east-west tropical Pacif...
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Brian McNoldy @bmcnoldy.bsky.social · 23/09/2026
I started pointing this out in early JULY, but the sea surface temperature averaged over the Gulf of Mexico is record high, while the ocean heat content is near record low. Fascinating stuff, all summer long! Jul 7: bsky.app/profile/bmcn... Aug 19: bsky.app/profile/bmcn...
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Kim Wood @drkimwood.bsky.social · 21/09/2026
Sea surface temperatures (SSTs) in the Niño 3.4 monitoring region have been unparalleled for this time of year for a while. Though the daily Relative Oceanic Niño Index (RONI) perspective is a bit more moderate, that index shows high (and increasing) values as well.
Chart of area-averaged daily sea surface temperature (SST) in the tropical Pacific between 170-120W and 5S-5N (the Niño 3.4 monitoring region) as of 20 September 2026. Black shows the 1991-2020 average, orange shows 2024, red shows 2025, and blue shows 2026 (to this date). The faint gray lines are individual years during 1982-2023. An inset map depicts September 20th's map of anomalies, where the dashed box represents the averaging region used to make the line plot values. These are computed from NOAA's OISST dataset using Python.Time series chart for the daily relative Oceanic Niño Index (RONI) computed from NOAA's OISST dataset using Python. Blue shows 2026 to date (20 September), dashed lines represent examples of past years entering an El Niño phase (1982, 1997, 2015), and all other lines are individual years during the OISST period of full-year records that began in 1982.
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Huei Sears, PhD 🌟 @starlights.bsky.social · 22/09/2026
The ! human ! brain ! is ! two ! separate ! organs ! what !!! amazing 🧪🧠 #FundScience www.the-independent.com/news/science...
the-independent.com
Human brain is actually two separate organs, scientists find
The Stanford University breakthrough stands to open new doors for research into fatal neurodegenerative diseases
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Brandon Bishop @brandontbishop.bsky.social · 21/09/2026
The goal, of course, is to get a big enough part of the educated public *waves at Bluesky* demanding research into things like the pre-Last Glacial Maximum Pleistocene or the tectonics that shuttered (or opened) circum-planetary ocean circulation or The Great South American Biological Experiment, or
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felinecannonball @felinecannon.bsky.social · 18/09/2026
Clumped isotope method using measurements of three different oxygen isotopes in tooth enamel. Looking pretty birdy. www.science.org/doi/10.1126/...
science.org
The body temperature of Tyrannosaurus rex
Despite an extensive history of study, quantitative constraints on the thermophysiology of Tyrannosaurus rex remain limited. Here, we derive a thermodynamically based determination of T. rex body temp...
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Kau))) @carbon8.bsky.social · 17/09/2026
AI slop tells in #paleoclimate manuscripts: "chronology-aware" "flag assumptions" "proxy pipeline" "atmospheric/oceanic expressions" "moisture-routing geometry" etc. 🙈
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Jaime @jysuarezibarra.bsky.social · 15/09/2026
New thread: I’m also taking the opportunity to share a preprint on the morphological variability of Globigerinoides ruber and G. elongatus, “Resolving and quantifying morphological ambiguity in the planktonic foraminifera genus Globigerinoides”: doi.org/10.22541/ess...
doi.org
Resolving and quantifying morphological ambiguity in the planktonic foraminifera genus Globigerinoides | ESS Open Archive
Members of the Globigerinoides ruber complex were amongst the earliest foraminifera taxa defined by d'Orbigny in the early 19thcentury. Yet, due their morphological similarity, differentiated only by ...
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Jaime @jysuarezibarra.bsky.social · 15/09/2026
Very happy with the gift and amazed by the knitting talent of my colleague #RachelBrown at @unisouthampton.bsky.social, inspired by a figure from a paper led by @carbon8.bsky.social…
Four Globigerinoidws forms in black on a beautifully knitted rainbow background; not to scale.
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Kau))) @carbon8.bsky.social · 16/09/2026
This is amazing!! 🤩
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Andrej Spiridonov @andrejpaleo.bsky.social · 04/09/2026
Wonderful world of cephalopod evolution in deep time... " Here we provide an overview of some exciting fields in cephalopod research, where (in our biased opinion) the most impressive advances have been made." 🧪⚒️ #Geology #Paleobio #EvoBio www.cambridge.org/core/journal...
Morphological changes during the evolution from bactritids (top) to the first and slightly derived Devonian ammonoids and changes in ecology.
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Prof Ian Hall @ianhall.bsky.social · 04/09/2026
More sad news... Puffin population drops sharply at key UK colony amid climate change concerns www.independent.co.uk/news/uk/home...
independent.co.uk
Puffin population drops sharply amid climate change concerns
Experts said the drop in numbers is ‘disappointing’
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ClimateBook @climatebook.bsky.social · 04/09/2026
Sitting through these excellent talks on paleoclimate proxies and modelling at the FuPa Paris summer school (focusing on warm climates like the Eocene and Miocene and Pliocene), there is one aspect of the terminology that drives me absolutely nuts. Terms like "MidMiocene Climatic Optimum"
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Kate Littler @palaeoclimate.bsky.social · 28/08/2026
Ditto for paleoclimate. You only have an exciting ‘big picture’ story by amalgamating lots of little ‘parochial’ studies (often that couldn’t attract significant external funding), running some pretty models, and submitting it to Nature. Please recall that the next time you are on a grants panel.
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Andrew B. Watkins @windjunky.bsky.social · 28/08/2026
The 2026 El Niño is second only to 1997 when you account for climate change, but easily first if you leave climate change in. Nice 2026 El Niño article by Emily Becker at climate.us (the former climate.gov killed by the Orange One).
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Kau))) @carbon8.bsky.social · 24/08/2026
The local resident (mama) #Bobcat seen at Sweetwater Wetlands, #Tucson
Side profile of a bobcat with black ear tufts, pale green eyes, and its mouth slightly open, standing against a softly blurred beige-and-gray background.Bobcat resting on sandy ground beneath brush, forepaws stretched forward. Its tufted ears stand upright and its mouth is open, showing its tongue and teeth.Portrait of a bobcat facing the camera amid blurred green vegetation.
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Kelly Hereid @kellyhereid.bsky.social · 24/08/2026
Integrated assessment models make contact w physics, hilarity ensues: It's one thing to say "IAM negative emissions are unrealistic" - but needing to produce largest global carbon capture facility every ~36hrs from today through 2050 to hit lower end of net zero goals does put some mustard on it.
From https://iopscience.iop.org/article/10.1088/2753-3751/ae987b

Achieving gigaton rates of sequestration in 2050 as most energy system models suggest would require building 250 Gorgon-scale sequestration projects every year between now and 2050, based on realized injection rates of about 0.4 Mt y−1. Compounded over a 25 year buildout to 2050, this yields ∼2.5 Gt CO2 y−1 of cumulative operating capacity, consistent with the lower end of net-zero sequestration targets. Realistic planning across diverse geologies must assume modest injectivities of 0.2–0.5 Mt y−1, consistent with a majority of on-going projects (Ringrose and Meckel 2019). At this rate, achieving even the lower end of projected sequestration—1 Gt y−1 by 2050—would require drilling thousands of wells each year until 2050. For comparison, the total number of active drilling rigs (onshore plus offshore) in the US at the end of June 2026 was 581 (Hughes 2025). The drilling activity alone needed to achieve projected levels of sequestration—2–5 Gt CO2 y−1—would be larger than the entire existing oil and gas industry.
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Ryan H Glaubke @ocnogrphr.bsky.social · 20/08/2026
Geoscience directorate expected to grant $110m in 2027, compared to $918m in 2023. 🫠
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Yaroslav Barsukov #NoToWar #НетВойне @barsukov.com · 17/08/2026
AI RANT (cont’d) The most troubling thing about this is, Originality AI is apparently used by agents & publishers alike. Dear agents and publishers, PLEASE DO NOT FORGET: AI “detectors” are slop machines same as the slop machines whose output they purport to analyze. 🧵4/5
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Moriaki Yasuhara @moriakiyasuhara.bsky.social · 16/08/2026
New from our lab!! Toxic metals and perfluorobutane sulfonate acid (PFBS) suppress aerobic metabolic capacity and alter hypoxia sensitivity in the marine ostracod Stigmatocythere costa www.sciencedirect.com/science/arti...
sciencedirect.com
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Melissa Chemam @melissaontheroad.bsky.social · 14/08/2026
Arday said he had been driven to resign because the “relentless accusations, speculation and public commentary have taken a profound toll on me and on those I love”.
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The Institute for Bird Populations @instbirdpop.bsky.social · 13/08/2026
Did you ask for a bird fact? No, but you're getting one whether you like it or not. 🪶
Photo, by David Larson, of a female Northern Yellow Warbler peering out of her nest with an (anthropomorphized) irritated expression on her face. Text on the graphic says "Unsolicited Bird Fact: Northern Yellow Warblers are frequently parasitized by
Brown-headed Cowbirds and female warblers have a specific strategy when they spot a female cowbird
looking for a nest to lay an egg in. Gill and Sealy
(1996) found that female Northern Yellow Warblers give special "seet" calls then rush back to their nest and sit tightly and silently in it
when they see a cowbird on the prowl. But when a nest predator is spotted they give more
"chip" alarm calls and perform distraction
displays.
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Kau))) @carbon8.bsky.social · 13/08/2026
🚨ATTN: Paleoceanographers + Paleoclimatologists🚨 There's a new (sub)venue for your short-format papers @agu.org's #PaleoceanographyAndPaleoclimatology! 🌊 Take a look at what type of articles we are looking for:
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Sarah Feakins @sfeakins.bsky.social · 13/08/2026
Short and sweet? Got exciting paleooceanography and paleoclimatology results to share in a short format paper? AGU PP will now accept Research Letters, simplifying transfers from tabloids and GRL. @carbon8.bsky.social explains...
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Bill Minarik @silicatefondue.fosstodon.org.ap.brid.gy · 12/08/2026
McGill Assistant Professor in Atmospheric and Oceanic Sciences, Oceanography & Earth Systems We seek candidates who will pursue research in physical oceanography with a strong modelling, observational and/or theoretical component. Review of applications begins 15 Oct. 2026. Questions addressed […]
fosstodon.org
Original post on fosstodon.org
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Kau))) @carbon8.bsky.social · 12/08/2026
Greatly enjoyed reading this book—v thoroughly researched, and it provides a powerful perspective on humanity's ongoing CO₂ addiction. Highly recommended!
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Kau))) @carbon8.bsky.social · 12/08/2026
Grateful to see that Anubhav's research (Kaur, @amjukar.bsky.social et al.) featured @nature.com #India News—v nice article by Sahana Ghosh: "Inside an extinct hyena’s prehistoric pantry" #Pleistocene #paleoclimate #paleoecology 🔨 www.nature.com/articles/d44...
nature.com
Inside an extinct hyena’s prehistoric pantry
Chemicals in the fossils of the hyena’s prey help palaeontologists reconstruct the mosaic landscape it inhabited.
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Martin H. Trauth @martinhtrauth.bsky.social · 12/08/2026
One of my professors at the University of Karlsruhe once said, “No book is as good as its next edition.” Here are the corrections for MRES (6th Edition 2025) and PRES (2nd Edition 2024), along with links to the corrected Supplementary Materials: mres.uni-potsdam.de/2026/08/12/m...
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Horrorcore Kool Moe Dee Simpson @luarvik.bsky.social · 12/08/2026
the words "Koyaanisqatsi: Free with ads" are really doing something in my head. nothing particularly good, I think. but it's happening
youtube thumbnail for Koyaanisqatsi with a "free with ads" label under it
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Kau))) @carbon8.bsky.social · 12/08/2026
This was a fun and insightful listen!
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Tom Di Liberto @tdiliberto.bsky.social · 06/08/2026
This is frustrating. Because we'll see El Nino blamed a million times in the media for some extreme event occurring anywhere on earth over the next 9 months, regardless of how dubious the connection. (With no mention that climate change likely influenced any El Nino impact anyway!) 1/2
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David Ho @davidho.bsky.social · 28/07/2026
There's a lot to unpack in this article about ocean alkalinity enhancement. But the bottom line is that it is way too early to be selling credits for marine CO₂ removal (mCDR) when we don't have a trustworthy way to do carbon accounting for mCDR. 🌊🧪 carbon-pulse.com/530737/
Most mCDR company science is otherwise focused on proving that a particular method actually removes CO2 from the atmosphere, and does so safely. That's established through monitoring, reporting, and verification (MRV) measures, developed by companies that set the rules for generating carbon credits, such as Isometric.

Burt acknowledged that this is itself an active area of debate. He argued that Planetary's role is to trust that the MRV measures are robust enough for the company to focus on feeding the right data to the carbon credit-generating methodologies.

David Ho, an oceanography professor at the University of Hawaii, was more critical.
"It's way too early to be selling credits and claiming that we have any certainty about anything," Ho told Carbon Pulse.

Ho said the methodology used to calculate Planetary's carbon credits relies on the use of a single model to determine the volume of CO2 removal. If another model was used, it would generate a different value, he suggested. Scientists at the IPCC run many models and take the average as a fair result, he added.

Ho is a lead author for an upcoming IPCC methodology report on the latest CDR science across land, air, and sea. The report could serve as independent proof that the emergent industry is an effective way of removing CO2 from the atmosphere. However, a report outline finalised in late 2025 left OAE out of the table of contents.

"You have to ask, why is that? If OAE is really the promising one that everybody's putting money into, why isn't it in that methodology report?" asked Ho.
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Jesse Farmer @jfarmersalmanac.bsky.social · 07/08/2026
Excited to share a new publication led by @maayanyehudai.bsky.social, "Reduced N2 fixation in the tropical Atlantic Ocean during the warm late Pliocene," out in Nature Communications today! Open access: www.nature.com/articles/s41... (1/~8)
nature.com
Reduced N2 fixation in the tropical Atlantic Ocean during the warm late Pliocene - Nature Communications
Tropical Atlantic nitrogen isotope records show that N₂ fixation was reduced during the warm late Pliocene due to decreased global water column denitrification. It increased as Earth cooled into the P...
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Kau))) @carbon8.bsky.social · 05/08/2026
This is an *incredible* finding—esp. cool that they resemble #ptarmigans! 40,000-year-old bird carvings provide clues to how ice age humans flourished 🪶 www.nature.com/articles/d41...
nature.com
40,000-year-old bird carvings provide clues to how ice age humans flourished
Newly discovered figurines point to skills that might have helped shape early humans’ expansion across Europe.
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Melissa Berke @melissaberke.bsky.social · 04/08/2026
New special collection just went live! Happy to chat about it, but the short version of benefits are: rolling publications (as ready) and increased citations (by being “grouped”) and multiple involved AGU journals! Got gateway papers coming? Think about submitting your work here!
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The Onion @theonion.com · 04/08/2026
New Evidence Suggests Dinosaurs Had Quinceañeras theonion.com/new-evidence-suggests-…
New Evidence Suggests Dinosaurs Had Quinceañeras
Latin American Coming-Of-Age Celebration Dates Back To Triassic Period
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Julien Kimmig @jkimmig.bsky.social · 04/08/2026
Welcome to the CAMBRIAN FECAL REVOLUTION. We didn't name it the Cambrian fecal explosion for obvious reasons. I'm happy to share this paper on fecal matter and its role in Cambrian ecosystems. So if you want to read a really shitty paper (50 days free access): authors.elsevier.com/a/1nYg8cZ3X7...
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Homepage - Eos [Unofficial] @eos.org.web.brid.gy · 03/08/2026
eos.org
The Definitive Guide to the TEX86 Paleothermometer
The marine sedimentary biomarker pool receives membrane lipids from multiple archaeal groups and sources living throughout the water column and sediments, as well as bacterial lipids from marine and terrestrial sources. Understanding the contribution of these different inputs is essential for interpreting TEX86 paleotemperatures and other lipid-based paleoclimate proxies. Credit: Elling et al. [2026], Figure 13
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Ken Caldeira @kencaldeira.com · 26/07/2026
Does anyone have informed perspectives on this paper? Seems important if true, important to refute if false. "Our results provide the first observational evidence that low clouds have partially offset recent warming, ... " agupubs.onlinelibrary.wiley.com/doi/10.1029/...
In this study, we combined satellite observations, reanalysis data sets, and a cloud-controlling factor (CCF) framework to quantify historical low-cloud cover (LCC) variability and its associated feedbacks. By harmonizing 13 long-term satellite data sets using anomalies and extending the record back to 1979 using CCF-based reconstructions, we constructed a physically grounded and temporally consistent record of LCC variability. The CCF method reproduces observed LCC anomalies well (𝑟 =0.85
 for 1982–2024; 𝑟 =0.93
 for 2001–2020), lending confidence to both the reconstructed record and the associated historical trends.

Across all data sets, tropical ocean LCC increased robustly since 1979 at a rate of 0.18 ±0.07%
 per decade over 1979–2025, concurrent with approximately 1,K
 of global surface warming (0.21 ±0.03%
 per decade). When normalized by the temperature trend, this corresponds to 0.85 ±0.32%,K−1
, with stratocumulus regions accounting for nearly 90%
 of the signal. Using observed 𝑑⁢𝐶⁢𝑅⁢𝐸/𝑑⁢𝐿⁢𝐶⁢𝐶
 relationships, this translates into a strongly negative low-cloud feedback of −0.79 ±0.3,W,m−2,K−1
, in contrast to the positive feedback observationally inferred from idealized abrupt-4×CO2
 experiments (0.50 W m−2 K−1
 in this study and 0.42 −0.56 W m−2 K−1
 in Cesana and Del Genio (2021); Myers et al. (2021)).

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2026GL124158
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Benjamin Cook @dustybowl.bsky.social · 23/07/2026
New work led by Sonali McDermid and me (w/ Ram Singh, Anna Harper, and Danica Lombardozzi) "Twentieth-century North American reforestation as an historical analogue for examining Natural Climate Solutions" iopscience.iop.org/article/10.1...
iopscience.iop.org
Twentieth-century North American reforestation as an historical analogue for examining Natural Climate Solutions
Twentieth-century North American reforestation as an historical analogue for examining Natural Climate Solutions, McDermid, Sonali Shukla, Cook, Benjamin I., Singh, Ram, Harper, Anna, Lombardozzi, Danica
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Kau))) @carbon8.bsky.social · 23/07/2026
Regardless of how you slice and dice the metrics—this #ElNiño will be a whopper with *severe* climate impacts for tropical (+other) countries. 🌊
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Mineralogical Society of America @mineralsocamerica.bsky.social · 22/07/2026
Would you like to go to a small, friendly, affordable meeting where you can present your interesting mineral-based research and experience the breadth of the mineral sciences in a beautiful location? Consider submitting an abstract to the 2027 MSA Tucson Meeting (deadline October 31)!
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Kau))) @carbon8.bsky.social · 21/07/2026
🚨🚨We have a new paper out in @natgeosci.nature.com led by postdoctoral scholar Na Wang (now @ucsantabarbara.bsky.social), where we identify a last-millennium climate “seesaw” linking extreme #hydroclimate events across both Central Asia & mainland Southeast Asia ☔️ www.nature.com/articles/s41...
nature.com
Opposing hydroclimate extremes in Central and mainland Southeast Asia over past millennium - Nature Geoscience
Opposing wet and dry conditions in Central and mainland Southeast Asia over the past millennium were controlled by climate variability over the Pacific and Indian oceans, a pattern likely to become mo...
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Jake Berv @jakeberv.bsky.social · 20/07/2026
Happy to share this 'capstone' project from my time as a postdoc @umich.edu, where we show that hierarchically nested bursts of body-shape evolution may underlie much of perching-bird diversification over ~50 million years. Free access link here: rdcu.be/fuxB1
rdcu.be
Rates of passerine body plan evolution in time and space
Nature Ecology & Evolution - A reconstruction of the evolutionary history of passerine body plans over the past ~50 Myr shows rare bursts of phenotypic innovation near the origin of major...
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Julio the Artist @lacerdajulio.bsky.social · 05/07/2026
Oh, to be enjoying the warm waters of the WIS. #SciArt #artbyjulio
A top down view of shallow, clear and cyan-tinted water with some dark rocks along the seafloor. Three Hesperornis, aquatic birds, are in the water, one floating on the surface and two others submerged, moving towards a school of fish. A mostly white Geosternbergia, a pterosaur, flies overhead looking down.
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Kau))) @carbon8.bsky.social · 16/07/2026
On "climate tumbles" by @alevermann.bsky.social: "Instead of analysing future climate as a sequence of quasi-equilibria—as a system that will settle when the world stops emitting carbon— researchers must treat it as an unstable system that is reorganizing" @nature.com www.nature.com/articles/d41...
nature.com
‘Climate free fall’: why the biggest risk to our economies is yet to be recognized
Increasing instability of the ocean, ice and atmosphere threatens farming, finance and society. We all need to wake up to that fact.
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Renato Santos @dracontes.bsky.social · 08/07/2026
In digging through old taxonomy works to ascertain this or that detail of taxonomical history, I sure wasn't expecting a Star Wars-type text crawl of author accolades. From Daniel Giraud Elliot's "A review of the primates" vol. II (1913), www.biodiversitylibrary.org/item/39494#p...
Partial screenshot of a scan of the title page of the monograph "A Review of the Primates", vol. II by Danial Giraud Elliot (1913) hosted by Biodiversity Heritage Library. It reads:

REVIEW OF THE PRIMATES

BY DANIEL GIRAUD ELLIOT, D. Sc, F. R. S. E., &C.

Commander of the Royal Orders of the Crown of Italy, of Frederic of Wurtemburg, and of Charles the Third of Spain; Knight of the Imperial and Royal Orders of Francis Joseph of Austria, of the Dannebrog of Denmark, of the Albert Order of Saxony, of St. Maurice and St. Lazare of Italy, of Isabella the Catholic of Spain, of Christ of Portugal, of Philip the Magnanimous of Hesse, etc., etc.; Fellow of the Royal Society of Edinburgh, of the Zoological Society of London; A Founder and ex-Vice-President of the Zoological Society of France; A Founder and ex-President of the American Ornithologists' Union; Honorary Member of the Kuttall Ornithological Club; of the Linnaean Society of New York; of the New York Zoological Society ; Member of the Imperial Leopoldino-Carolina Academy of Germany, of the Academy of Natural Sciences of Philadelphia, of the Academy of Sciences of New York, of the Société D'Accliraatation of Paris, of the New York Historical Society; Corresponding Member of the Royal Academy of Sciences of Lisbon, of the Natural History Society of Boston, etc., etc.
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ΜΑΝΟΣ ΤΡΑΧΙΑΣ™ @trahias.bsky.social · 08/07/2026
Keith Dalgleish (Canadian Artist, born 1962) "Northern Flicker", 2022. Acrylic on Canvas, 20 × 30 inches. Private Collection. #art #painting #artist #BlueSkyArt
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Andrej Spiridonov @andrejpaleo.bsky.social · 06/07/2026
This is really interesting. The common cause (of evolution, taphonomy) does deep: "Monsoon-driven storms created a Cretaceous dinosaur Lagerstätte. Microbial mats enabled rapid sealing and exceptional soft-tissue preservation." www.sciencedirect.com/science/arti... 🧪 ⚒️ #Geology #Paleobio
Depositional model and facies details of the VdP deposits. (A) Reconstructed sequence of events: (Top) High-energy cyclonic events transport terrigenous debris, plant matter, and tetrapod carcasses across undisturbed tidal flats. (Middle) Coarse sediment settles to form a storm layer, rapidly stabilised by microbial mat draping; sinking vertebrate carcasses create impact deformation structures in the soft substrate. (Bottom) Resumption of tidal rhythms immediately buries isolated bones and debris, while articulated carcasses retain soft tissue, progressively buried by onlapping laminae over multiple tidal cycles. (B) Photomicrograph showing the typical fine, undisturbed rhythmic couplets. (C) A photographic detail illustrating an event bed, overlain by distinctive microbial draping structures. (D) A reddish, oxidised plant leaf transported from the hinterland, representing material delivered by flood pulses. Scale bars: 1 mm.
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