"A three-body problem is extremely complicated. Now we're dealing with four: the sun, Earth, the moon and Mars. The heavy lifting was more challenging than I initially thought." When you purchase ...

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 ...

The curious minds at What If predict what would happen if Earth collided with Mars, revealing catastrophic destruction, orbital instability, and planetary debris. Canada has a secessionist movement on ...