Frozen deep beneath Antarctica and Greenland lies something remarkable. Tiny bubbles of ancient air, locked away in ice for hundreds of thousands of years, hold secrets about our planet's past.
A new study of sediment cores shows a series of massive emissions of carbon dioxide over a 20 million year period about 300 million years ago. These CO2 emissions happened at the same time as drops in ...
Penn History and Sociology of Science assistant professor Melissa Charenko recently published a new book discussing how 20th-century climate researchers used proxies to model ancient climates. The ...
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