Editor's Note: EPA says it will roll back climate rules. That could prove complicated Announcing big changes to environmental rules doesn't undo facts on the ground overnight. Instead, EPA's announcement is the first step in what is likely to be a lengthy process to remake the rules and policies it targeted. Neela Banerjee
The Asian elephant population in Cambodia is more robust than previously thought Some 400 to 600 Asian elephants are believed to remain living in the wild in Cambodia. Researchers said the study's findings underscore the potential of a "national stronghold" for the species. The Associated Press
Photos: Across the U.S., sky gazers marvel at the blood moon lunar eclipse As the moon moved through the shadow of the Earth, it was also being illuminated by light from the sun — causing the moon to appear as if dipped in a deep red hue in a stunning celestial sight. Juliana Kim
A U.S. influencer outrages Australians by snatching a baby wombat from its mom Outdoor enthusiast Sam Jones left Australia after posting a video of herself separating a baby wombat from its mom on a dark road. Australians are cheering her departure and worrying about the animal. Rachel Treisman
Heat can age you as much as smoking, a new study finds Exposure to heat can alter the way your DNA works, according to a new study. The effects could lead to long-term health outcomes. Alejandra Borunda
Researchers are rushing to build AI-powered robots. But will they work? Artificial intelligence has revolutionized the virtual world. But reality bytes. Geoff Brumfiel
2 NASA astronauts return to Earth after an unexpectedly long mission in space NASA astronauts Suni Williams and Butch Wilmore were on the International Space Station more than nine months, despite launching into space in June for what was expected to be an eight-day mission. Joe Hernandez
A cell pulls off one of the 'Holy Grails' of biotechnology A new part of an ocean plant cell has been discovered that might revolutionize farming one day. The structure can take nitrogen and convert it into the ingredient that helps all organisms grow. Ari Daniel Play AudioListen 5 mins
5 nature-inspired ways to bring joy and wonder into your life this spring Simple activities to help you better appreciate the birds, bees and flowers — and spend more time outside. Malaka Gharib Life Kit
This astronaut spent over 100 days in space. Here's how he says that affected him Jack Fischer spent more than 100 days aboard the International Space Station in 2017. He described to NPR what being in space for so long does to the body and what it feels like to return home. A Martínez Obed Manuel Play AudioListen 4 mins
