Wednesday, May 20, 2020

Ancient ocean oxygen levels associated with changing atmospheric carbon dioxide

Why do carbon dioxide levels in the atmosphere wax and wane in conjunction with the warm and cold periods of Earth's past? Scientists have been trying to answer this question for many years, and thanks to chemical clues left in sediment cores extracted from deep in the ocean floor, they are starting to put together the pieces of that puzzle.

from Latest Science News -- ScienceDaily https://ift.tt/36hWN6B

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They fled the flames—now jaguars rule a wetland refuge

After devastating wildfires scorched the Brazilian Pantanal, an unexpected phenomenon unfolded—more jaguars began arriving at a remote wetla...