Scientists have found signs of a new kind of gravitational wave. It's really big Scientists say they've found evidence of a very long gravitational wave that could open a window onto supermassive black holes — and perhaps even other extreme, unseen objects in the universe. Nell Greenfieldboyce
For amateur astronomers, 'star parties' are the antidote to light-polluted skies Each year in northern Pennsylvania, hundreds of stargazers attend gatherings under increasingly rare dark skies to look for faint galaxies, star clusters and nebulae. Scott Neuman
Here's the latest on the missing Titanic sub and the race to rescue those inside The Titan, a minivan-sized submersible, was carrying five people to the Titanic's watery grave when it lost contact. Rescuers are expanding underwater efforts, a sign the vessel may be snagged. Emily Olson
A search is underway for a missing submersible that brings tourists to the Titanic A submersible capable of taking tourists over 2 miles underwater to view the Titanic wreckage up close has gone missing. Juliana Kim
Revenge of the killer whales? Recent boat attacks might be driven by trauma The marine mammals have been "attacking" sailboats since 2020. But those encounters are becoming more frequent, and some say the orcas' tactics are evolving. Scott Neuman
Fixing pickleball's noise problem Pickleball is one of America's fastest growing sports, but it has a noise problem. Bob Unetich is working to fix it. Mia Venkat
Humans traveled less during COVID restrictions. Animals traveled more Animals being tracked by scientists tended to travel longer distances in the early months of the pandemic, when people stayed home. The wildlife also ventured closer to roads. Nell Greenfieldboyce
Octopuses tweak the RNA in their brains to adjust to warmer and cooler waters The California two-spot octopus can edit the RNA in its brain to produce different proteins as ocean temperatures fluctuate, a new study finds. Ari Daniel
Volunteers helped tally terrapin turtles for science Scientists are relying more and more on non-scientists to help them gather data. That was the case recently on North Carolina's coast, where volunteers spent a day counting terrapin turtles. Kelly Kenoyer
Tune in for a livestream from Mars — a rare, almost real-time look into space On Friday 12 p.m. ET, spectators will have a chance to see the most current images of Mars possible, from the surface of the planet to Earth in 3 to 22 minutes, courtesy of the European Space Agency, Juliana Kim