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How To Fall Asleep And Why We Need More 

The National Sleep Foundation recommends an average of eight hours of sleep per night for adults, but sleep scientist Matthew Walker says that too many people are falling short of the mark.

“Human beings are the only species that deliberately deprive themselves of sleep for no apparent gain,” Walker says. “Many people walk through their lives in an underslept state, not realizing it.”

Walker is the director of the Center for Human Sleep Science at the University of California, Berkeley. He points out that lack of sleep — defined as six hours or fewer — can have serious consequences. Sleep deficiency is associated with problems in concentration, memory and the immune system, and may even shorten life span.

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Christopher Columbus: What Really Happened

“Lane” is the most complete Triceratops specimen known to date.

Ban on US Import of Elephant Trophies Remains, For Now

On Friday, President Trump tweeted that he was putting the decision to reverse a ban on elephant trophy imports "on hold," pending a review of "all conservation facts."

President Trump tweeted that he was putting that decision “on hold,” pending a review of “all conservation facts.”

Just 1°C of ocean warming can upend marine ecosystems 

For 9 months, the researchers monitored the distribution and growth of marine species that settled on the heated boxes and compared them with those that lived above unheated boxes. All it took was one look to notice the difference, Ashton says. In the 1°C increase experiment, a single species of moss animal, Fenestrulina rugula, doubled its growth rate. Within 2 months, the calciferous shelves it created dominated the community, the team reports today in Current Biology. What’s more, overall species diversity plummeted by 50%.