NASA's Galileo mission to Jupiter and its moons came to an end. After 14 years of exploration, the Galileo spacecraft ...

LOS ANGELES — Earth is about to get a new neighbor in the form of an asteroid. But this one won’t be making an impact.

Planetary scientists are confident this moon of Jupiter harbors a deep ocean. A looming question is whether it hosts the ...

However, another way of learning -- a relatively neglected one -- is 'learning by thinking', in which one gains knowledge ...