The Improbable Rise of Planet Earth
Planet hunters have detected nearly 5000 confirmed and candidate planets beyond our solar system.
2016-06-30 19:00:00 - SpaceRip
Most sun-like stars, it seems, are ringed with giant planets that crowd their parent stars and leave no room for planets like ours. The old theories about planetary formation are giving way to a new one defined by fierce gravitational battles and titanic collisions.
How did Earth manage to survive?