Tektites, rare natural glasses formed by ancient asteroid impacts, were found stretching across more than 900 kilometers of the country’s interior.

A new study found that children living near mine tailings in Johannesburg had nearly twice as much uranium in their hair as children not living near tailings—and the younger the children, the higher t...

During the Last Glacial Maximum, the deep Northwest Atlantic was only about 2 °C colder than today, suggesting sustained production of relatively warm North Atlantic Deep Water during the Last Glacial Maximum.

Biogenic carbonate of eggshells can be used as a new geochronometer through direct calcite U-Pb dating, producing high accurate ages, as revealed by two tests on dinosaur eggs from North America and M...

Here, the authors combine newly collected juniper wood samples and herbarium samples, and published data to create a continuous, chronological paleoclimate record spanning the past ~500 years. This im...

YouTube video by Anna Ruth Halberstadt

A picture of what West Antarctica looked like when its ice sheet melted in the past can offer insight into the continent’s future as the climate warms.

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...