Among the animals now described Prof. Boule considers he can recognise every gradation between the Pliocene bears and the modern brown bear; he also sees some approach to a Pliocene species in the ...

Kiguktak, a paleontology field technician and bear monitor who also happens to be the former mayor of Grise Fiord, is part of a research group studying these fossil-bearing sites, of which only a few ...

But a new study indicates that pandas are a part of what was once a flourishing collection of even larger bears. ... as 8 million years ago until they died out in the middle of the Pliocene, ...

The Pliocene wound to an end around 2.6 million years ago, as CO 2 levels dropped. Chemical reactions with eroding rocks may have sucked much of the CO 2 out of the atmosphere and tucked it away ...

And now, she notes, atmospheric carbon dioxide levels are once again what they were in the Pliocene: “It’s a snapshot of the world we’re likely to go toward if we don’t curb emissions.” ...

The last time CO2 levels were as high as today was 3 million years ago during a much warmer time on Earth called the Pliocene. It's a provoking thought for Earth Day.