NBC: New data from the Earth's last big warmup, some 56 million years ago, may offer a sneak peek into what today's climate change may eventually look like.
Scientists have determined that the rate at which carbon emissions heated up the planet during the late Paleocene is much more similar to modern human-caused warming than many experts previously thought, a new report published Monday in Nature Geoscience shows.
The good news, the researchers say, is that most of the species around at the time...