Gizem

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Ocean acidification drove Earth’s largest mass extinction

New evidence suggests that ocean acidification played a key role in the Permian–Triassic mass extinction event 252 million years ago that killed most …

Earth Science

Moonlit skies to subdue 2016 Lyrid meteors

Lyrid meteor shower active from about April 16-25. Best before dawn. If you’re lucky, you might catch a bright Lyrid overcoming the light of the full …

Mars rover Curiosity spots strange, 2-tone veins on planet's surface

Climbing up Mt. Sharp in the middle of Gale Crater, NASA's Mars rover Curiosity has discovered two-tone veins of minerals that reveal multiple episodes of water flowing through rock — even after the lake that once filled the bottom of the crater had ceased to be.<p>The rover's discovery points to a …

Mars Rover

Men And Women Use Different Scales To Weigh Moral Dilemmas

You find a time machine and travel to 1920. A young Austrian artist and war veteran named Adolf Hitler is staying in the hotel room next to yours. The doors aren't locked, so you could easily stroll next door and smother him. World War II would never happen.<p>But Hitler hasn't done anything wrong …

The Week in Review: Record Drought, Record Action

California Gov. Jerry Brown ordered mandatory water reductions for the first time in the state’s history, after a four-year drought and a rough winter for snowfall.<p>On Wednesday Brown called for a 25 percent reduction in the state’s 400 local water supply agencies, which serve nearly all of …