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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: James Seagrove who wrote (1002618)	2/27/2017 11:30:51 AM
From: Wharf Rat	Read Replies (1) \| Respond to of 1576121

"There have been long periods of time on earth where that was not the case." Your lifetime, when there are 7B humans, hasn't been one of them. Final closure of Panama and the onset of northern hemisphere glaciation sciencedirect.com " an organism has three choices — adapt, move/disperse, or go extinct," Most critters no longer have migration corridors because of human development; hippos and elephants will have a hard time going out of Africa. We've also set up boundaries which tend to inhibit human migration, so that Africans will have a hard time going out of Africa, and people from the Western Hemisphere will have a hard time coming here or passing through if they intend to walk to Canada. You might have heard the chants of "build that wall", and "ban Muslims". Climate change forced over 1 million Africans from their homes in 2015= When the Arctic was 8 °C warmer You won't see it in any travel guides, probably because of its name, but Lake El'gygytgyn offers many wonders. Lately it's been in the news because of fascinating paleoclimatic data the lake has yielded to researchers drilling its bottom. They managed to extend the climatic chronology of northern latitudes by a couple of millions of years and showed, besides a lot of other interesting stuff, that the last time the atmosphere contained 400 ppm of carbon dioxide, the Arctic was around 8 °C warmer than it is now. neven1.typepad.com