Author: NPR

Earlier this month NPR health correspondent Rob Stein introduced us to Victoria Gray, the woman at the center of a groundbreaking medical treatment using CRISPR, the gene-editing technique. This week, Rob reports exclusively for NPR on the first results of that closely-watched experiment. Follow host Maddie Sofia on Twitter @maddie_sofia. Email the show at shortwave@npr.org.

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Happy World Toilet Day! Flushing toilets can consume a lot of water, so Tak-Sing Wong, a biomedical engineer at Penn State University, is trying to minimize how much is needed. Wong developed a slippery coating for the inside of a toilet bowl. It can potentially move human waste more efficiently, leaving a cleaner bowl and using less water. Follow host Maddie Sofia on Twitter @maddie_sofia. Email the show at shortwave@npr.org.

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The Smithsonian's National Zoo is bidding farewell to Bei Bei. The 4-year-old giant panda will be sent to China on Tuesday, Nov. 19. While born in captivity at the zoo, Bei Bei is the property of China. Reporter Emily Kwong tells us about Bei Bei's elaborate departure plans, why he's leaving now, and what it would take to ensure the survival of giant pandas in the wild.

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While doing field work in Central America in the 1990's, biologist Karen Lips noticed the frogs she was studying were disappearing. Scientists in other parts of the world had documented the same thing - frogs and amphibians dying at an alarming rate. For years no one knew what was killing the animals until, finally, a bit of good luck helped solve the mystery. Follow host Maddie Sofia on Twitter @maddie_sofia. Email the show at shortwave@npr.org.

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How can you tell if you have the flu, or the common cold? Why does your arm hurt after you get the flu shot? And can getting the flu shot actually give you the flu? This episode, we answer your flu-related listener questions with the help of Dr. Nicole Bouvier at the Icahn School of Medicine at Mount Sinai. Follow host Maddie Sofia on Twitter @maddie_sofia and reporter Emily Kwong @emilykwong1234. Email the show at shortwave@npr.org.

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The private space company run by Elon Musk launched 60 satellites into orbit this week. Science correspondent Geoff Brumfiel explains why astronomers worry that kind of traffic — if it continues unabated — could permanently alter their ability to observe the night sky. Follow host Maddie Sofia on Twitter @maddie_sofia. Email the show at shortwave@npr.org.

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NPR science correspondent Dan Charles explains why most of the dairy cows in America are descended from just two bulls, creating a lack of genetic diversity that can lead to health problems. He also visits a lab at Penn State University where scientists are trying to change that. Follow reporter/host Emily Kwong on Twitter @emilykwong1234. Email the show at shortwave@npr.org.

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A lot of the stuff we buy in the U.S. comes by ship — ships that use a particularly dirty kind of fuel. Now a big shipping company says it wants to go zero carbon. Climate reporter Becky Hersher tells us how some old tech might play a role and where that tech falls short. Follow Maddie on Twitter @maddie_sofia. Email the show at shortwave@npr.org.

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Helium is the second-most common element in the cosmos, but it's far rarer on planet Earth. As part of our celebration of the periodic table's 150th birthday, reporter Geoff Brumfiel shares a brief history of helium's ascent, to become a crucial part of rocket ships, MRI machines, and birthday parties. Follow host Maddie Sofia on Twitter @maddie_sofia. Email the show at shortwave@npr.org.

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What happens after a whale dies? Their carcasses, known as "whale falls," provide a sudden, concentrated food source for organisms in the deep sea. Biologist Diva Amon is our guide through whale-fall ecosystems and the unique species that exist on these fallen whales.

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