Plus, a discovery from a vanished people, solving the long COVID puzzle—and can dogs help us life longer?
|  | Monday, January 30, 2023 | | | | |
 | IMAGE BY ESA/WEBB, NASA & CSA, J. LEE AND THE PHANGS-JWST TEAM; ESA/HUBBLE & NASA, R. CHANDAR AND J. SCHMIDT
| | The most ancient galaxies in the universe are coming into view, thanks to NASA’s new James Webb Space Telescope.
These “toddler” galaxies formed relatively soon after the Big Bang, offering a glimpse into the primordial universe. But they're also raising new mysteries.
“There are an awful lot of them—too many, too big, too bright, too hot, too mature, and too soon,” says NASA’s John Mather, the telescope’s senior project scientist. Where did they go? What happened?
Read the full story here.
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 | IMAGE BY NASA, ESA, CSA, M. ZAMANI (ESA/WEBB)
| | | New eyes: The James Webb Space Telescope has only been operational for six months, but it's already broken the record for identifying the farthest galaxies ever seen. Closer galaxies, like the Phantom Galaxy (at top), are becoming even brighter by combining optical images from Hubble and mid-infrared images from JWST. Read more. | | | |
 | | PHOTOGRAPH BY PAUL SALOPEK | | | |
 | | PHOTOGRAPH BY MARTA NASCIMENTO, REA, REDUX | | | Averting another crisis: When the baby formula shortage started in February 2022, it renewed an interest in breast milk banks—and no country does it better than Brazil. Today the country runs 228 of the world’s approximately 750 donated milk banks. Even firefighters and postal workers help the cause. (A baby in Rio de Janeiro receives both his mother's milk and donated milk, above.) | | | |
 | | PHOTOGRAPH BY JESSICA WYNNE | | | Chalk meditations: In an age of digital screens, chalkboards continue to be the medium of choice for mathematicians. Why? “That’s like asking a painter why they paint with oils,” says photographer Jessica Wynne who has photographed chalkboards around the world. (Above, a chalkboard at the Institut Henri Poincaré in Paris.) | | | |
| WHAT IN THE SOLAR SYSTEM? | |
 | | PHOTOGRAPH BY JUAN CARLOS CASADO, SCIENCE PHOTO LIBRARY | | Can you tell the difference? One becomes a shooting star when it enters the Earth’s atmosphere. The other is a bright streak all on its own (like Neowise, above). Both asteroids and comets have the potential to cause mass extinction if they crashed into us, but one is icy and the other's just rock. But can you tell the difference by seeing them? Click here to find out.
Related: How comets and asteroids unlock secrets of the solar system | | | |
Today's soundtrack: Galaxy Song, Monty Python's The Meaning of Life
Today's newsletter was curated and edited by Sydney Combs, Jen Tse, and David Beard. Have an idea or link to a story you think is right down our alley? Let us know at sydney.combs.-nd@natgeo.com. Happy trails! | | | |
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