Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.

It catches very low frequency radio waves made by lightning, solar storms and charged particles moving through Earth’s ...

Astronomers have sharply revised down the mass of nearby super Earth GJ 3378b, dramatically improving its prospects as a ...

Saturn is among the worst offenders. With its giant system of rings and moons and its extremely orderly magnetic field, the ...