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Dr Olive Heffernan

@oliveheffernan.bsky.social
732 followers 40 following 128 posts

Science journalist and author of THE HIGH SEAS. Lover of all things oceans.

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Dr Olive Heffernan @oliveheffernan.bsky.social · 06/05/2026
Looking forward to speaking at the International Literature Festival Dublin on May 23rd. I'm joining authors Gill Arbuthnott and Patchen Barss to discuss trust, truth and science in an age of misinformation. The event - part of amazing line-up - can be booked here: lnkd.in/d6fvtZbR
lnkd.in
LinkedIn
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Gaia Vince @wanderinggaia.bsky.social · 10/03/2026
Our geoengineering has heated and acidified the oceans. Can we reverse it? Study reported by @oliveheffernan.bsky.social
theguardian.com
Testing the waters: can pumping chemicals into the ocean help stop global heating?
To some it was a reckless experiment but scientists hope the dispersal of 65,000 litres of sodium hydroxide into the Gulf of Maine could ease the climate crisis
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Environmental Information: Use and Influence (Dalhousie Univ.) @eiui.bsky.social · 11/03/2026
The #ocean fills a key role in Earth’s climate by absorbing #carbon. Could ocean alkalinity enhancement, ie, adding chemicals, equip the ocean to absorb more carbon & combat global warming? @oliveheffernan.bsky.social reports on a debated test in the Gulf of Maine www.theguardian.com/environment/...
Title, journalist’s name, headline, photograph of two boats in the Gulf of Maine, and first two paragraphs of an article about experimental ocean alkalinity enhancement published in The Guardian
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Dr Olive Heffernan @oliveheffernan.bsky.social · 13/03/2026
My latest article, for Oceanographic Magazine, details how tangle net fishing for crayfish is threatening the local extinction of Ireland's angel sharks. Like these iconic ocean species, inshore fishers in Ireland are feeling the squeeze. Can we save both? lnkd.in/gDpcDXPc #oceanconservation
lnkd.in
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Dr Olive Heffernan @oliveheffernan.bsky.social · 13/03/2026
The first open-ocean test of Ocean Alkalinity Enhancement (OAE) - a technology intended to reduce atmospheric CO2 and address ocean acidification - can work and is safe, at least at small scales. I've written about it for the Guardian: lnkd.in/dq529S6K
lnkd.in
LinkedIn
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Dr Olive Heffernan @oliveheffernan.bsky.social · 29/01/2026
Excited to announce that I’ll be giving a public lecture at the NI Science Festival in February, on iconic species in Irish waters and the need for restoration of our seas. There will be charismatic creatures, It’s open to everyone, and I’ll be signing books. Book your ticket here: lnkd.in/eUtEJJfh
lnkd.in
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Dr Olive Heffernan @oliveheffernan.bsky.social · 28/11/2025
I was at Dublin Zoo today, to give a reading from THE HIGH SEAS. Thanks for the invitation. It was heartening to meet so many dedicated to animal - and esp cetacean - welfare and research. #marinemammals #ocean #sciencecommunication #highseas2024
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Dr Olive Heffernan @oliveheffernan.bsky.social · 24/11/2025
A thrill to see THE HIGH SEAS so proudly displayed in my old neighbourhood of Stoke Newington, London. Thank you! #thehighseas #ocean #journalism #sciencewriting #highseas2024
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Dr Olive Heffernan @oliveheffernan.bsky.social · 24/11/2025
An overdue thanks for a great conversation about THE HIGH SEAS with the science writing MA class at Johns Hopkins University. It is always, always great to meet and talk to fellow science and environment writers. #highseas2024 thehighseas #journalism #ocean #writing
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Dr Olive Heffernan @oliveheffernan.bsky.social · 09/11/2025
Thanks to the Beta Festival 2025 for a great discussion on the politics of water, at Dublin's Digital Hub this weekend. #highseas2024 #oceans #oceanconservation
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Dr Olive Heffernan @oliveheffernan.bsky.social · 07/11/2025
Put this in the diary. Dec 4 at The Project, Dublin, will be a celebration of the life and work of Emma O'Kane. It's also a fundraiser for the incredible Emma O'Kane Bursary, which supports developing artists in Ireland. Details here: www.emmaokanebursary.ie/news/project...
emmaokanebursary.ie
Project Arts Centre Benefit Event
SUPPORT THE EMMA O’KANE BURSARY - Benefit screening of WillFredd Theatre's film of JOCKEY. Directed by Sophie Motley, co-created and featuring Emma O’Kane. Followed by a panel discussion with key cre...
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Dr Olive Heffernan @oliveheffernan.bsky.social · 07/11/2025
I am so thrilled to learn that the High Seas Treaty has won the Earthshot Prize. This was so well deserved, for a collective sustained effort over decades to protect the half of our planet that is unclaimed ocean. Congratulations! #highseas #oceans #bbnj
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Dr Olive Heffernan @oliveheffernan.bsky.social · 20/09/2025
I recently had the most wonderful chat about the ocean with Colm O’Regan (comedian, maths nerd, author of Climate Worrier) for The Function Room, a maths podcast. Such fun. We got into some serious number crunching, all while talking about the #highseas. You can listen here: lnkd.in/eFtzW3hc
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Dr Olive Heffernan @oliveheffernan.bsky.social · 20/09/2025
Morocco becomes 60th nation to ratify the High Seas Treaty, getting it over the line: www.nytimes.com/2025/09/19/c...
nytimes.com
Hard-Fought Treaty to Protect Ocean Life Clears a Final Hurdle
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Dr Olive Heffernan @oliveheffernan.bsky.social · 20/09/2025
To find out more about the wonders of the High Seas, and why this half of the planet deserves our attention, and protection, read my book, The High Seas, out now in paperback! #highseas2024 #thehighseas #bbnj
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Dr Olive Heffernan @oliveheffernan.bsky.social · 20/09/2025
Amazing news! The United Nations High Seas Treaty has crossed the required 60-country ratification threshold, meaning that the agreement will enter into force in January. This is a major win for ocean conservation. Congrats to all of those involved in making this happen! #bbnj #highseas2024
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Dr Olive Heffernan @oliveheffernan.bsky.social · 06/08/2025
I recently had the most wonderful chat about the ocean with Colm O’Regan (comedian, maths nerd, author of Climate Worrier) for The Function Room, a maths podcast. Such fun. We got into some serious number crunching, all while talking about the high seas. You can listen here: lnkd.in/eFtzW3hc
lnkd.in
LinkedIn
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Dr Olive Heffernan @oliveheffernan.bsky.social · 10/07/2025
Congrats Sophie! Shame I didn't make it to the awards last night!
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Dr Olive Heffernan @oliveheffernan.bsky.social · 04/07/2025
Thank you @profilebooks.bsky.social! and to all of the readers who have reached out. It's been an amazing journey so far. I look forward to many more conversations about the future of our ocean and planet.
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Profile Books @profilebooks.bsky.social · 03/07/2025
Happy Paperback Publication Day to The Irish Times Bestseller #TheHighSeas by @oliveheffernan.bsky.social! 🌊🌍 Get your copy here: tinyurl.com/TheHighSeasPB
The blue and green book The High Seas in the centre on a watery background, with the writing "out in paperback in July 2025" on the bottom-right side of the image, and the white Profile logo on the bottom-left of the image.
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Dr Olive Heffernan @oliveheffernan.bsky.social · 04/07/2025
Thank you! 😁
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Dr Olive Heffernan @oliveheffernan.bsky.social · 03/07/2025
It's publication day for THE HIGH SEAS paperback! Thanks to my publishers and to everyone who has reached out about the book this past year. It's been an amazing journey so far. Looking forward to many more conversations about the future of our ocean. #highseas #highseas2024 #ocean #environment
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Dr Olive Heffernan @oliveheffernan.bsky.social · 03/07/2025
Great to see THE HIGH SEAS on display at Books at One, Letterfrack. Out in paperback from tomorrow! #highseas #ocean #environment #highseas2024
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Dr Olive Heffernan @oliveheffernan.bsky.social · 01/07/2025
This week I visited Pacific Palisades in LA, a neighborhood destroyed by the January fires. Shocking to see the scale of destruction, just outside of the city, and people's determination to start over and rebuild.
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Dr Olive Heffernan @oliveheffernan.bsky.social · 01/07/2025
Only two days until the release of THE HIGH SEAS paperback! Out July 3rd and available from all the usual places! #highseas2024 #ocean #highseas #scicomm #environment
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Dr Olive Heffernan @oliveheffernan.bsky.social · 01/07/2025
Thrilled to be a finalist for this year's Steve Connor Award for Investigative Journalism, for my piece in The Journal Investigates on the decline of Lough Hyne Marine Reserve. www.thejournal.ie/investigates... Thanks to my editor, Maria Delaney, to my funders at The Pulitzer Center and to ABSW.
thejournal.ie
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Dr Olive Heffernan @oliveheffernan.bsky.social · 17/06/2025
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Dr Olive Heffernan @oliveheffernan.bsky.social · 14/06/2025
Delighted to speak with Eli Tremps for ‘She has a Voice’ about the mysteries of the high seas, ocean protection and my experience of being a woman reporting on the ocean. A timely conversation for the end of the UN Ocean Conference in Nice. You can tune in here: tinyurl.com/b9fhpj5y
tinyurl.com
3x31 (EN) Olive Heffernan : Secrets of the High Seas and why they matter more than ever
She has a voice · Episode
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Dr Olive Heffernan @oliveheffernan.bsky.social · 12/06/2025
Delighted to speak with Eli Tremps for ‘She has a Voice’ about the mysteries of the high seas, ocean protection, and my experience of being a woman reporting on the ocean. A great conversation and a timely one for the UN Ocean Conference in Nice. You can tune in here: tinyurl.com/b9fhpj5y
tinyurl.com
3x31 (EN) Olive Heffernan : Secrets of the High Seas and why they matter more than ever
She has a voice · Episode
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Dr Olive Heffernan @oliveheffernan.bsky.social · 12/06/2025
Delighted to speak with Eli Tremps for ‘She has a Voice’ about the mysteries of the high seas, ocean protection and my experience of being a woman reporting on the ocean. A great conservation and a timely one for the UN ocean conference in Nice. You can tune in here: tinyurl.com/b9fhpj5y
tinyurl.com
3x31 (EN) Olive Heffernan : Secrets of the High Seas and why they matter more than ever
She has a voice · Episode
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Dr Olive Heffernan @oliveheffernan.bsky.social · 11/06/2025
At an enlightening “Abyss talk” on deep sea mining in a tiny pub in Nice. Leticia Carvahlo here too! Loving UNOC. #unoc3 #ocean #deepseamining #highseas
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Dr Olive Heffernan @oliveheffernan.bsky.social · 11/06/2025
Ireland's Edge has released a podcast of a session I joined in Dingle 2024, on what ocean protection means in practice. Raises many of the same issues discussed in my book THE HIGH SEAS, in David Attenborough's Ocean film, and at UNOC this week in Nice. You can tune in here: tinyurl.com/mr2hebyk
tinyurl.com
Parks and Recreation: How Do National Parks Fit Into the National Picture?
IRELAND'S EDGE · Episode
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Dr Olive Heffernan @oliveheffernan.bsky.social · 10/06/2025
At UN Ocean Conference in Nice today. 50 states (inc EU) have now ratified the High Seas Treaty. 136 nations have signed. 60 ratifications needed soon to reach target of protecting 30 percent of ocean by 2030. Why is this important? All is answered in THE HIGH SEAS, out in paperback July 3rd.
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Dr Olive Heffernan @oliveheffernan.bsky.social · 10/06/2025
If you've watched David Attenborough's most recent film 'Ocean' and want to learn more about the deep sea, mysterious ocean habitats and our past and future relationship with the ocean, read THE HIGH SEAS. Out in paperback July 3rd. #DavidAttenborough #Books #NatureBooks #Ocean #Climate #UNOC
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Dr Olive Heffernan @oliveheffernan.bsky.social · 08/06/2025
On World Oceans Day, dive into the story of our human relationship with the high seas - that half of our planet that is unclaimed territory. THE HIGH SEAS is out in paperback July 3. profilebooks.com/work/the-hig...
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Dr Olive Heffernan @oliveheffernan.bsky.social · 08/06/2025
On this World Oceans Day, consider the high seas and the need for UN member states to ratify the high seas treaty and ensure the protection of half of our planet! Heading to UNOC in the morning. Maybe see you there! #unoc #highseas2024 #oceans
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Dr Olive Heffernan @oliveheffernan.bsky.social · 08/06/2025
Started today at Borris House listening to Melvin Sheldrake and Helen MacDonald discuss the entangled web of life on this planet. A pretty epic start to World Oceans Day!
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Rowan Hooper @rowhoop.bsky.social · 05/06/2025
We explored the issue of mining the deep sea in the podcast, with @tinymaddie.bsky.social and @oliveheffernan.bsky.social www.youtube.com/watch?v=pbE0...
youtube.com
99.999% of the ocean floor is still unexplored - what lurks beneath?
YouTube video by New Scientist
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Dr Olive Heffernan @oliveheffernan.bsky.social · 05/06/2025
A new analysis by Oceana and GFW shows how China now dominates global fishing activity, accounting for 44% between 2022 and 2024. That's 57,000 vessels and 110 million hours of fishing time. Full report here: lnkd.in/e3RWAuxW #IUUfishing #highseas2024 #ocean #oceana @globalfishingwatch.org
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Dr Olive Heffernan @oliveheffernan.bsky.social · 05/06/2025
A new analysis by non-profit Oceana, out today, shows how China now dominates global fishing activity, accounting for 44% between 2022 and 2024. That's 57,000 vessels and 110 million hours of fishing time. Full report here: lnkd.in/e3RWAuxW #IUUfishing #highseas2024 #ocean #oceana
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Dr Olive Heffernan @oliveheffernan.bsky.social · 02/06/2025
THE HIGH SEAS, out in paperback July 2025. A timely read about the ocean and why it needs protection. lnkd.in/eyBrFiqc
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Dr Olive Heffernan @oliveheffernan.bsky.social · 02/06/2025
So honoured to be a finalist for the ABSW Steve Connor Award. Thank you @absw.bsky.social
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ABSW @absw.bsky.social · 29/05/2025
🔎Steve Connor Award for #InvestigativeJournalism #ABSWawards 📣Meet the #finalists 🎉🎉🎉 👉 Sophie Borland @bmj.com 🔗zurl.co/b1r2k 👉 @oliveheffernan.bsky.social @investigates.thejournal.ie 🔗zurl.co/u5ER7 👉 @terezapultarova.bsky.social @arstechnica.com 🔗zurl.co/lh85B zurl.co/gWdMb
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Dr Olive Heffernan @oliveheffernan.bsky.social · 02/06/2025
THE HIGH SEAS is out in paperback from July 3rd, and available from all the usual outlets. A particularly timely read on the state of the open ocean and what we can do to protect this vast frontier. @profilebooks.bsky.social #highseas2024 #thehighseas #oceanprotection #ocean
THE HIGH SEAS is out in paperback on July 3rd, and available from all the usual outlets. A particularly timely read on the state of the world's ocean and what we can to protect it.
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Dr Olive Heffernan @oliveheffernan.bsky.social · 26/05/2025
Well the ocean bounces back quickly, so if we had the right policies in place, we could do a whole lot in a short space of time. But we need policy-makers who understand what effective ocean protection means, and who are willing to do something about it. Still waiting for an MPA bill in Ireland!
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Dr Olive Heffernan @oliveheffernan.bsky.social · 26/05/2025
I had a brilliant time with the Women from the Sea team at EU Maritime Day in Cork last week. What a pleasure to meet such an inspiring team! Find out more about this UN Ocean Decade project, focused on women with a deep ocean connection, at: lnkd.in/eKYqShee
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Dr Olive Heffernan @oliveheffernan.bsky.social · 26/05/2025
I’m shortlisted for the ABSW Steve Connor Award for Investigative Journalism for a piece on the decline of Europe’s oldest marine protected area, published in The Journal Investigates: lnkd.in/eKXUpNWd. I’ve also written a long read on this for Hakai: tinyurl.com/mvnxhav2 Both timely, given 30X30!
hakaimagazine.com
For the Love of a Little Sea | Hakai Magazine
The birthplace of experimental marine biology is in decline. Will Ireland rally to save it?
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Dr Olive Heffernan @oliveheffernan.bsky.social · 14/05/2025
THE HIGH SEAS paperback has arrived in London. I can't wait to get my copies next week! Available from July 3 in all the usual places. #thehighseas #highseas2024
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The Journal Investigates @investigates.thejournal.ie · 19/05/2025
Our investigation exposing environmental issues at Lough Hyne is one of just three finalists in the investigative category of the @absw.bsky.social Awards! Congratulations Olive from our entire team!! You can read about how Olive undertook this year-long project here: mailchi.mp/thejournal/t...
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ABSW @absw.bsky.social · 19/05/2025
"A clear and poetic approach that makes the piece especially impactful." Congratulations! 👏👏 #ABSWawards www.absw.org.uk/pages/meet-t...
absw.org.uk
Meet the Finalists 2025 | Association of British Science Writers
Find out who has made it to the finals in this year's ABSW Awards
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