Data collected by NASA's InSight lander suggest that ancient internal processes are responsible for the "Martian dichotomy" ...

Mars will appear to make an ultraclose approach to the moon on Sunday, after Jupiter had a turn earlier this week. Here's how ...

Since the dawn of the science of warfare, when the battle became more than two groups simply slogging it out until one is annihilated, armies have long recognized the importance of capturing the high ...