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Physiology

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MINNEAPOLIS (AP) — George Floyd died of a lack of oxygen from being pinned to the pavement with a knee on his neck, medical experts testified at former Officer Derek Chauvin’s murder trial Thursday, emphatically rejecting the defense theory that Floyd's drug use and underlying health problems killed him.

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GENEVA (AP) — A team of international and Chinese scientists is poised to report on its joint search for the origins of the coronavirus that sparked a pandemic after it was first detected in China over a year ago — with four theories being considered, and one the clear frontrunner, according to experts.

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