A teenage girl's changing appearance and voice baffle doctors. ...read more

Scientists disagree on how to eat for your best life. Dieting may never be the same. ...read more

If only we could regrow our broken bones like Harry Potter, Skele-gro style. Or, at the very least, heal up like a limb-regenerating newt. Alas, we humans possess no such abilities. Though our bodies can mend broken bones, the older we get, the shoddier that patch job gets. As for cartilage — the crucial cushioning that keeps our bones from rubbing together — once that’s gone, it’s gone for good. But a new discovery by researchers could change that outlook. A team from S ...read more

Neanderthals had bigger brains than people today. In any textbook on human evolution, you’ll find that fact, often accompanied by measurements of endocranial volume, the space inside a skull. On average, this value is about 1410 cm3 (~6 cups) for Neanderthals and 1350 cm3 (5.7 cups) for recent humans. So does that quarter-cup of brain matter, matter? Were Neanderthals smarter than our kind? While brain size is important, cognitive abilities are influenced by numerous factors includi ...read more

Hana Raza has never seen a Persian leopard. But thanks to her, we know the big cats still roam the Zagros Mountains of Kurdistan. After four decades of war in Iraq, the species was thought to have followed the Asiatic lion and cheetah into local extinction. But Raza says she never lost hope. “It’s a very adaptive creature,” she says. “And I just thought, it’s too strong. It can survive the wars.” With a freshly minted bachelor’s degree in biology, she jo ...read more

Dark matter research is unsettling. Scientists were unnerved when they first noticed that galaxies don't rotate by the same physics as a spinning plate. The stars at a galaxy's edge rotate faster than expected. And their motion can only be explained by a lot of invisible matter that we can't see. That was exciting more than unsettling when the field was new and ideas were plentiful and had yet to be proven wrong. Researchers consolidated the possibilities into two main camps, complete wit ...read more

NASA’s Transiting Exoplanet Survey Satellite (TESS) launched April 18, headed for an orbit that takes it out to about the distance of the Moon at its apogee. Just a few weeks later, it began science operations and a list of 50 exoplanet candidates rolled in, with researchers now expecting at least six of those first candidates to be eventually confirmed as bona-fide planets. The above image represents TESS’ “first light” science image, starting in the first of 26 sectors ...read more

Neutron stars, the end-stage remnants of massive stars, are high-energy objects. They’re usually studied in X-rays, some of the most energetic light in the universe. Neutron stars also give off radio emissions, most famously as pulsars. But now, infrared emission around a neutron star detected with the Hubble Space Telescope has sparked curiosity, indicating that astronomers may want to add infrared light to their neutron star-studying toolkit. Heat Sensor Infrared detectors are the n ...read more

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