Plus, a body fat that keeps you youthful, monuments to love, and a quiz featuring "cocaine hippos"
|  | Wednesday, February 15, 2023 | | | | |
 | PHOTOGRAPH BY ALLISON SHELLEY, THE WASHINGTON POST/GETTY IMAGES
| | We know that COVID can cause tinnitus, that dreadful, disruptive ringing in your ears.
But can COVID vaccines cause tinnitus as well?
Health agencies around the world are investigating a tinnitus-vaccine connection after complaints by vaccine users—among them, more than 16,000 Americans. Last week, the Centers for Disease Control announced it has stopped looking into it, saying it did not find “sufficient evidence.” Some researchers are urging the U.S. to reconsider. “People are suffering,” says Dr. Gregory Poland, who directs the Vaccine Research Group at Mayo Clinic. What’s the next step?
Read the full story here.
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 | | PHOTOGRAPH BY FROGGYFROGG, ISTOCK/GETTY IMAGES PLUS | | | |
 | PHOTOGRAPH BY CHRIS JOHNS, NAT GEO IMAGE COLLECTION
| | | Hippos in the wild: On this World Hippo Day, we celebrate the Earth's third largest animal, shown above on the Zimbabwe-Zambia border. Hippos now are at the center of a rewilding effort in a country an ocean away. What country has these so-called “cocaine hippos”? Click here for the answer. | | | |
 | PHOTOGRAPH BY DAMON WINTER/THE NEW YORK TIMES/REDUX
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Born in protest: It took student action in the late 1960s to get traditionally white colleges to offer African American studies. Such courses explore the history of people of African descent, the legacy of slavery, and how racism pervades our social structures. Considered foundational at most colleges but still controversial in some high schools, ethnic studies courses have helped students “develop a greater sense of self-efficacy and personal empowerment, perform better academically, and graduate at higher rates,” a 2020 analysis found. (Pictured above, students walking through a California high school.)
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 | | ILLUSTRATION BY ANDREW FAZEKAS | | Adiós Green Comet: If you haven’t gotten a glimpse of the famed ZTF coment yet, tonight may be your last easy chance to track it down. The cosmic iceberg will be positioned (above left) next to the very bright orange star Aldebaran, which marks the eye of Taurus, the bull constellation. You’ll need binoculars to see them in the south evening sky. While you’re out, look for bright Venus pairing up with the most distant major planet in the solar system, Neptune. While Venus is an easy naked-eye target low in the southwest horizon about an hour after sunset, the ice giant is just a mere blue speck in binoculars. — Andrew Fazekas
Also: How did Saturn get it’s rings?
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Today’s soundtrack: Never Forget, by Sampa The Great (from Wakanda Forever) Sampa the Great breaks down the song for us—and shares Zambia’s rich linguistic heritage—in the latest episode of Overheard, the Nat Geo podcast, with biologist and Nat Geo Explorer Danielle Lee.
This newsletter has been curated and edited by Jen Tse, Sydney Combs, and David Beard. Have an idea or a link? We'd love to hear from you at david.beard@natgeo.com. Thanks for reading! | | | |
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