The possibility of life on other planets is one of the biggest mysteries in science. But what would happen if we actually ...

A new map reveals a blue Mars three billion years ago and strengthens the evidence of an ancient ocean that covered much of ...

There is a lot of evidence from orbiting satellites and surface rovers indicating that liquid water was present long ago on ...

Searching for past or present life on Mars is the sole driving force behind every mission we send to the red planet, from orbiters to landers to rovers. However, there remains a concern in the ...

At half the size of Earth and one-tenth its mass, Mars is a featherweight as far as planets go. Yet new research reveals the extent to which Mars is quietly tugging on Earth's orbit and shaping the ...

From Mars, Earth transits the Sun four times in a 284-year cycle. The transits occur in either May or November at intervals of 100.5, 79, 25.5, and 79 years. During these events, Earth and the Moon ...