michael e woolf

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Obama speaks up for protester but is derided by Trump | Reuters

FAYETTEVILLE, N.C.,/HERSHEY, Pa. (Reuters) - President Barack Obama chastised supporters at a rally for Democratic presidential nominee Hillary Clinton in North Carolina on Friday, as tensions spiked when a supporter of Republican opponent Donald Trump began protesting.<p>But that didn’t stop …

Donald Trump

The KATRIN Tritium Neutrino experiment: A giant scale for the tiniest of particles

Neutrinos are so tiny and inconspicuous, physicists believed for a long time that they have no mass. Now, a massive device that is supposed to …

Physics

Astronomers prove 200-year-old theory about why it gets dark at night

A theory that explains why it gets dark at night – dismissed by scientists for 200 years – has been proved right by new research using images from …

What we lose when we lose the world’s frogs

Amphibians survived the dinosaur extinction just fine. Why are they in peril now?<p>In September, a frog died in an Atlanta botanical garden. With it went an entire species never to hop along the Earth again. Biologists at Zoo Atlanta who’d looked after the frog for the past 12 years called him …

A comet may have hit the Earth 56 million years ago, study says

Million of years in the past, a comet or an asteroid might have slammed into the Earth at an important time in its climatic history, scientists …