An Ancient Ninth Planet That Went Missing

Our solar system is like a 4.6-billion-year-old crime scene.

Crater-ridden surfaces, misaligned planetary orbits and streams of interplanetary debris are the cosmic equivalents of blood spatters on the wall and skid marks from a getaway car. These and other clues tell of a chaotic beginning for our planetary family.

Read Full Article »
Show comments Hide Comments

Related Articles