Mars is absolutely dripping with evidence that the red planet was once a striking blue, complete with glistening lakes, ...

Olympus Mons is a giant volcano on Mars. It is the tallest mountain in space. It is almost three times higher than Mount ...

Mars today is a frozen, dusty desert. But if you look deep inside Valles Marineris, the largest canyon system on Mars and in ...

Olympus Mons on Mars is the tallest mountain in the solar system, towering nearly three times higher than Mount Everest.

"Without Mars, Earth's orbit would be missing major climate cycles. What would humans and other animals even look like if ...

Billions of years in the future, our Sun will become a red giant and then die out. But when the Sun dies, where do we go?

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 ...

The aurora borealis is one of the most fascinating, magnificent light displays that our planet can put on. But what exactly ...

Researchers uncover how Mars affects Earth’s orbit, offering new insight into the planetary forces behind ice ages.

This composite image was weeks in the making, as Horálek’s two "crossings" happened months apart. Mars traced its path ...

A Mars spacecraft has now been AWOL for more than a month. But NASA hasn't given up hope of restoring contact with the MAVEN ...

This doesn’t mean Mars causes ice ages on its own. Orbital cycles are only part of the picture. Earth’s oceans, atmosphere, ...