A new "biosignature" for our own planet may help astronomers find exoplanets that could support life—or other worlds that already do.
Aug. 28, 2019 • ~5 min
Microbes from salty, subzero waters in the Arctic could give researchers a glimpse of the kinds of environments where they might one day find alien life.
July 22, 2019 • ~6 min
The oceans on Saturn's moon Enceladus may have the chemical fuel necessary for life. If there's any around, that is.
June 24, 2019 • ~5 min
A shower of high-energy particles and nearby planets' gravitational pull may make planets in the "habitable zone" of the TRAPPIST-1 system anything but.
April 21, 2019 • ~8 min
Our planet is 4.5 billion years old, but its inner core may be a lot younger.
Jan. 31, 2019 • ~6 min
New research debunks the conventional wisdom that oxygen and organic compounds in the atmosphere are strong evidence of alien life.
Dec. 17, 2018 • ~4 min
A new report recommends we build a telescope to directly image Earth-like exoplanets. Astrophysicist Bruce Macintosh explains why that's a good idea.
Oct. 28, 2018 • ~1 min