The disappearances and deaths of 10 government workers tied to nuclear or space technology have sparked speculation online.

A single alien world can be misleading. A strange gas in an atmosphere might look promising, then turn out to come from ...

Trump says feds are reviewing missing researchers tied to classified aerospace/defense programs; possible 11th case.

Scientists Probe Star Interiors for Signs of Alien Life ...

Our planet rests inside a magnetic cocoon filled with plasma—but it's not always peaceful and quiet. Activity from the sun ...

Even at a glance, the planets in our solar system are wildly diverse. Huge and small, airless and densely packed with ...