250 million is the new 40: Mammals may already be halfway done on Earth, study finds The future is always hard to predict, especially millions of years from now. But researchers found that a future supercontinent centered around the tropics may be tough for mammals to survive. Becky Sullivan
This week's harvest moon will be the last supermoon of the year A supermoon occurs when the moon is closest to Earth along its elliptical orbit, which means it can appear larger and brighter to viewers. The last one of the year will be visible Thursday and Friday. Joe Hernandez
An annular solar eclipse is coming to parts of the U.S. in October Residents from Oregon to Texas may be able to glimpse the annular eclipse, when the moon is deep in its orbit and passes in front of the sun, creating a black circle on the star. Joe Hernandez
As psychedelic-assisted therapy grows, so does interest from a new group: chaplains Chaplains provide spiritual counsel at some of life's most raw moments. With psychedelic legalization spreading, some chaplains think this role should include facilitating psychedelic trips. Deena Prichep
Watch Live: NASA sends an asteroid sample back to Earth NASA's Osiris-REx mission sends a pristine sample of asteroid back to Earth Sunday morning. If it lands successfully, this cupful-or-so of space rock could shed light on the solar system's origins. Nell Greenfieldboyce
She got famous on YouTube. Now it helps fund her research in quantum gravity This theoretical physicist and mathematician drops a new video several times a month, dispensing her dry wit and pithy wisdom to a loyal fan base of nerds across the internet. Scott Neuman
A source of carbon — a building block of life — is found on Jupiter's moon Europa "The discovery signals a potentially habitable environment in the ocean of Europa," according to the Webb Space Telescope's website. Bill Chappell
NASA effort to bring home asteroid rocks will end this weekend in triumph or a crash NASA's first effort to retrieve samples from an asteroid will send a capsule that contains extraterrestrial pebbles and dust plunging towards a Utah desert on Sunday. Nell Greenfieldboyce
Why people are skeptical of green initiatives — like water-saving washing machines A laundromat owner in Aurora, Colo., installed washing machines that conserve water. His customers abandoned him, but he was able to win them back after learning why they might be skeptical. Rachel Estabrook
New NASA report lays out roadmap for studying UFOs NASA is releasing a new report from advisers on what it would take for the agency to study unidentified anomalous phenomena (also known as UFOs) scientifically. Nell Greenfieldboyce
