Science

5:12pm

Wed July 29, 2015
The Salt

Europe's Taste For Caviar Is Putting Pressure On A Great Lakes Fish

Originally published on Wed July 29, 2015 7:56 pm

Lake herring roe at the Dockside Fish Market in Grand Marais, Minn. Some workers at the market call it "Lake Superior Gold."
Derek Montgomery for NPR

Lake Superior is the largest freshwater lake in the world, by surface area, and it has something the other Great Lakes do not: stable populations of mostly native fish species.

But scientists say a key fish in Superior's food web is now in trouble because of mild winters and an appetite for caviar in Europe.

There wasn't much demand for lake herring 10 years ago. It used to be fed to mink and used as fertilizer, according to Craig Hoopman, a commercial fisherman in Wisconsin who fishes around Lake Superior's Apostle Islands.

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5:12pm

Wed July 29, 2015
Energy

Greenpeace Activists Protest Shell Oil's Plan To Drill In The Arctic Ocean

Originally published on Thu July 30, 2015 6:47 pm

Copyright 2015 NPR. To see more, visit http://www.npr.org/.

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4:53pm

Wed July 29, 2015
Goats and Soda

One Point Of View On How Lions Can Earn Money For Africa

Tourists on safari watch three young lions in Kenya's Masai Mara National Reserve.
Beverly Joubert National Geographic/Getty Images

A beloved lion in Zimbabwe — Cecil was his name — was wounded with a crossbow, then later shot dead. The animal had reportedly been lured from Hwange National Park, a protected area.

The dentist who killed the lion said he believes it was a legal hunt, for which he reportedly paid $50,000.

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11:21am

Wed July 29, 2015
13.7: Cosmos And Culture

'Unity': Are We There Yet?

Originally published on Wed July 29, 2015 2:52 pm

Unity is a film from the writer and director of Earthlings.
Nation Earth

5:05am

Wed July 29, 2015
All Tech Considered

Beam Me Up? Teleporting Is Real, Even If Trekkie Transport Isn't

Originally published on Wed July 29, 2015 7:00 pm

Star Trek's Mr. Spock and Captain Kirk never even lose pocket change when they use a transporter to get from TV's Starship Enterprise to distant worlds. What gives?
Paramount Television/The Kobal Collection

"I have a hard time saying this with a straight face, but I will: You can teleport a single atom from one place to another," says Chris Monroe, a biophysicist at the University of Maryland.

His lab's setup in a university basement looks nothing like the slick transporters that rearrange atoms and send them someplace else on Star Trek. Instead, a couple million dollars' worth of lasers, mirrors and lenses lay sprawled across a 20-foot table.

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5:32pm

Tue July 28, 2015
The Two-Way

Researchers Warn Against 'Autonomous Weapons' Arms Race

Originally published on Tue July 28, 2015 7:01 pm

"Starting a military AI arms race is a bad idea," says a group of researchers and concerned citizens who are urging a ban on offensive military weapons that don't rely on human control. The group signed an open letter that's being delivered at a conference on artificial intelligence this week.

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5:00pm

Tue July 28, 2015
Around the Nation

Crews Scramble To Contain 3,000-Acre Fire In Glacier National Park

Originally published on Tue July 28, 2015 6:31 pm

Copyright 2015 NPR. To see more, visit http://www.npr.org/.

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5:00pm

Tue July 28, 2015
Science

University Of Lisbon Scientists Solve Pendulum Clock Mystery

Originally published on Wed July 29, 2015 7:00 pm

Copyright 2015 NPR. To see more, visit http://www.npr.org/.

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And now a vexing problem solved.

HENRIQUE OLIVEIRA: Tick-tock, tick-tock.

BLOCK: This is mathematician Henrique Oliveira. And for a while, he's tried to solve a problem that scientists have pondered for 350 years.

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4:02pm

Tue July 28, 2015
The Two-Way

Human Error Caused Virgin Galactic Crash, Investigators Say

SpaceShipTwo crashed in the Mojave Desert in California on Oct. 31. The co-pilot was killed.
Ringo H.W. Chiu AP

The crash of a Virgin Galactic spaceship last fall in California's Mojave Desert was caused by pilot error and design problems, the National Transportation and Safety Board announced Tuesday after a nine-month investigation.

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1:17pm

Tue July 28, 2015
Health

A Sense Of Self: What Happens When Your Brain Says You Don't Exist

Originally published on Thu July 30, 2015 8:49 am

Anil Ananthaswamy is a consultant for New Scientist Magazine.
Prasad Vaidya Dutton

Science journalist Anil Ananthaswamy thinks a lot about "self" — not necessarily himself, but the role the brain plays in our notions of self and existence.

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