Astronomers have detected helium escaping from LHS 1140 b, providing the first clear evidence of an atmosphere around a rocky planet in another star’s habitable zone.
A rocket engine that could cut the trip to Mars from nine months to one is sitting in a lab outside Moscow, and it pushes with roughly the force needed to hold an apple.
Two of the most careful measurements in modern science cannot agree on how fast the universe is expanding, and the James Webb Space Telescope was supposed to be the tiebreaker.