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Or the pleistocene when the ice age began 2.5 million years ago. and the holocene, was much more recent, beginning almost 12,000 years ago when the cold period came to an end. now scientists are trying to decide whether humans have had such a big impact on the planet that we have entered a new geological epoch called the anthropocene. here s our science editor rebecca morelle. heading to a site that records a turning point in the earth s history crawford lake in canada. and scientists are looking for signs of a new geological time period, the anthropocene epoch. so what we have here is the lake bed. when we just took the core, you see light, dark, light, dark layers. these layers are like tree rings representing every year of our past. i am quite sure 1950 is right around here. that would be the base of the proposed anthropocene epoch. this new epoch defines the moment ....
The history of the earth is divided into epochs periods of geological time that stretch back over billions of years. like the upper cretaceous 100 million years ago that s when dinosaurs roamed the earth. or the pleistocene when the ice age began 2.5 million years ago. and the holocene was much more recent almost 12,000 years ago when the cold period came to an end. now, scientists are trying to decide whether humans have had such a big impact on the planet that we have entered a new geological epoch called the anthropocene. here s our science editor rebecca morelle heading to a site that records a turning point in the earth s history crawford lake in canada. and scientists are looking for signs of a new geological time period, the anthropocene epoch. so what we have here is the lake bed. when we just took the core, ....
New research published in the Nature journal suggests that for at least 1,600 years of Earth’s history, the polar ice caps melted every single summer. And the polar bears that lived in these areas survived just fine despite all that seasonal “warming.” It turns out that summer is when conditions are warmer, meaning ice melts, […] ....
United States Secretary of State Antony Blinken and Chinese Foreign Minister Qin Gang shared concerns on a phone call Wednesday ahead of a planned visit by the U.S. official to China meant to shore up relations. ....