Topic - American Association For The Advancement Of Science

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Bill Gurolnick talks with his wife, Peggy Bartelstein, at their home in Northbrook, Ill., on Feb. 20, 2018. Gurolnick, who turns 87 in March 2018, is participating in a study at Northwestern University that researchers hope will help them understand why some people in their 80s and 90s are able to keep the same sharp memory as someone 20 or 30 years younger. (AP Photo/Teresa Crawford)

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In this undated handout photo of a polar bear taken in the Arctic National Wildlife Refuge. More than two-thirds of the world's polar bears will be killed off by 2050 - the species completely gone from Alaska - because of thinning sea ice from global warming in the Arctic, government scientists forecast Friday. (AP Photo/Subhankar Banerjee, File)

Poll shows giant gap between what public, scientists think

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