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Can Chocolate Boost Brain Health? Don't Binge Just Yet

There's tantalizing — if preliminary — evidence that compounds in cocoa may boost thinking, attention and memory. But headlines on the latest research get it wrong.
NPR

NASA: Sun Getting Ready For A 'Field Flip'

Scientists say the sun will reverse polarity within the next three to four months in an event that marks the midpoint of "solar max" — a period of peak solar activity.
NPR

Stars And Stripes: Pair Of Sumatran Tigers Born At National Zoo

Four-year-old Damai is "being a great mom, and is nursing and grooming both cubs," zoo officials say. There was no immediate word on the sex of the cubs.
NPR

What Makes Good Bacteria Go Bad? It's Not Them, It's You

The bacteria that cause many cases of ear infection in kids and pneumonia in the elderly are usually harmless until activated by distress signals from their human host. When the flu or another virus gives you a fever, for example, mild-mannered pneumococcus can turn nasty.
NPR

NIH Issues Guidelines For HeLa Cell Genome Data

The 2010 bestseller The Immortal Life of Henrietta Lacks highlighted ethical controversies surrounding scientists' use of HeLa cells. The cells are descended from a tumor taken without consent from Henrietta Lacks, a poor black woman who died in 1951. Ethical concerns resurfaced with the publication of the HeLa cell's genome. The National Institutes of Health has now issued guidelines. For an explanation, Linda Wertheimer talks to NIH director Francis Collins.
NPR

Science Rap B.A.T.T.L.E.S. Bring Hip-Hop Into The Classroom

The program is part of a national push for science education among minorities. A U.S. Department of Commerce study found that blacks and Latinos are half as likely as whites to have a job in science or engineering.
NPR

EPA Wants To Allow Continued Wastewater Dumping In Wyoming

The environmental agency has proposed permits that would allow oil companies to continue releasing contaminated wastewater onto the Wind River Reservation in central Wyoming. NPR found last year that the EPA has been allowing oil companies to send so much wastewater onto dry land that it was creating raging streams.
NPR

Climate Change Could Spell Final 'Chuckle' For Alpine Frog

The Cascades frog used to occupy alpine zones from California to the Canadian border, but its range is shrinking as global temperatures increase and snowpack declines. Scientists are hiking deep into the mountains of the Northwest to study the tiny frog, which makes a call that has been described as a "chuckling" sound.
NPR

Dolphins Recognize The Calls Of Long-Lost Friends

Scientists have known that dolphins recognize each other by the sound of each animal's signature whistle. But new research shows that dolphins remember and respond to these whistles for an incredibly long time — even after they've been separated from each other.
NPR

Black Holes One Of Space's Great Paradoxes

Late summer tends to be a slow month for news. But at All Things Considered, we put on a two hour program, no matter what. So — without a trace of irony — one of our science correspondents offered to help fill some holes in the show with a series of stories about holes. In this edition: Black holes.

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