In the summer of 1908, something exploded over a remote stretch of Siberian wilderness with the force of a thousand Hiroshima bombs — and to this day, nobody can say with absolute certainty what it was.
Tag: tunguska event
City-Killer Asteroids: The Space Rocks Scientists Are Watching Right Now
Every year, massive space rocks barrel past Earth — some large enough to destroy entire cities if they ever strike our planet.