Science Drone footage of narwhals sheds some light on their tusks Drone footage reveals what narwhals, the unicorns of the sea, actually do with their long spiraling tusks. Nell Greenfieldboyce Play AudioListen 4 mins
Science New research reveals ancient humans used animal bone tools much earlier than thought The handcrafted tools found in Tanzania were made 1.5 million years ago and were fashioned primarily from the bones of elephants and hippopotamuses. Chandelis Duster
Science Genetically modified citrus trees could help fight insect causing 'greening disease' A genetically engineered tree holds promise to possibly save Florida's citrus industry from an insect that causes "greening disease." The Asian citrus psyllid has devastated the industry. Jessica Meszaros Play AudioListen 4 mins
Science This week in science: a new desert flower, virtual lemonade and prehistoric bone tools In this week's roundup of science news, Emily Kwong and Regina Barber talk about a newly discovered desert flower, tasting lemonade in virtual reality, and prehistoric bone tools used by early humans. Emily Kwong Regina G. Barber Play AudioListen 8 mins
Science Butterfly numbers have fallen by nearly a quarter since 2000 Butterflies of all kinds of species, in all parts of the country, have declined by one to two percent since 2000. Jonathan Lambert
Science That galaxy next door? It's home to a monster black hole The Large Magellanic Cloud, a close neighbor to the Milky Way, may house a giant black hole. It's the closest supermassive black hole outside of our galaxy. Nell Greenfieldboyce
Science Intuitive Machines probe is on the moon but its status is uncertain Commercial company Intuitive Machines has put its second probe on the moon, but it was not immediately clear if the vehicle was upright and fully functioning. Geoff Brumfiel Scott Neuman
Environment In Key West, testing shows cruise ships stir up as much sediment as a hurricane Tests in Key West show sediment stirred up by cruise ships, which can harm marine life, routinely exceed federal standards. Key West has responded by suspending the tests. Greg Allen Play AudioListen 4 mins
Science An Algerian scientist splits his gaze between microbes and Mars Searching for small fossils in big rocks requires specialized tools --tools that scientists could also use to look for evidence of life on Mars in rocks that may be similar on both planets. Ari Daniel Play AudioListen 5 mins
Science Chappy the baby seal has died, weeks after being rescued in a Connecticut city The aquarium helping Chappy — a nod to the New Haven, Conn., neighborhood where he was rescued last month — said he died of gastrointestinal issues and "was surrounded by love until the very end." Rachel Treisman
