Paleo study shows how elevation may affect evolution

About 34 million years ago, global temperatures took a dive, causing a sudden wave of extinctions among European mammals. In North America, however, life went on largely unscathed. A new study explains why: The rise of the ...

Climate change 'tipping points' imminent

(Phys.org) —UC Berkeley's Tony Barnosky joined climate scientists this morning at a press conference at the National Academy of Sciences in Washington, D.C., to summarize a new report issued today focusing on the short-term ...

Ex-NASA expert issues call for climate solutions

Longtime NASA expert James Hansen has issued a call for new approaches to stop global warming, saying solutions are needed and that currently accepted targets are too dangerous.

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