Micah Hanks

Known as the giant-impact hypothesis, this proposed event involves a collision between Earth and a hypothetical Mars-sized protoplanet astronomers call Theia.

Fire erupted in the morning skies over Siberia on June 30, 1908, as an atmospheric explosion occurred that remains unmatched by any similar event in modern history.

According to some reports, at the height of the Cold War, the Soviet Union mounted a rapid-fire cannon aboard a secretive military space station.

Billions of years ago, something happened in our solar system that gave rise to one of the most peculiar planetary mysteries: What caused Uranus to spin on its side?

Although warp drives have long been considered to be exclusively a fictional idea, a growing number of physicists have begun to wonder in recent decades if they might really be possible.

For more than a century, astronomers have been captivated by the idea that an undiscovered planet could be lurking in the furthest reaches of our solar system.