These new Earth-size planets orbit a dwarf star named Trappist-1 about 40 light years from Earth. Some of them could have water on their surfaces.
Astronomers are excited by the discovery, which suggests that some of these exoplanets — planets around stars other than the sun — could support life and may be awash in oceans.
The National Zoo gave Bao Bao a Washington send-off, with her own motorcade. As part of an agreement, pandas born in the zoo must leave for China by age 4.
The Great Zimbabwe, the ruined city in Zimbabwe once used to justify white domination, is now a focus of the ZANU-PF party’s efforts to retain power.
Researchers tried to pin down why our brains can be susceptible to errors in perception that make us mix up mouth movements and sounds.
A retired scientist became a hero to some climate-change deniers after he criticized his former boss at NOAA over data handling.
A small discrepancy in the value of a long-sought number has fostered a debate about just how well we know the cosmos.
The National Institutes of Health studies dietary supplements and advises the public and professionals, but its conclusions are often complicated.
A Falcon 9 rocket from Elon Musk’s Space Exploration Technologies Corporation, SpaceX, was launched at the John F. Kennedy Space Center in Florida on Sunday, carrying supplies, experiments and cargo to the International Space Station.
The company used a new pad for the first rocket launch to take place at Kennedy Space Center in five and a half years.