"What If is an epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a ...

"What if the Moon suddenly began getting closer to Earth? To the point where it was on a collision course with our planet? Would the Earth survive the crash? Or, would a crash even happen?

Following is a transcript of the video. Narrator: Our moon is on the move. Each year, it drifts an estimated 1.5 inches further away from Earth. And in the process, Earth's rotation is actually ...

Regardless of whether or not they succeed, their ambitious idea really made us wonder… What would happen if Earth had two moons? Well, it wouldn't be pretty. Imagine the Moon's identical twin ...

The moon is no small object, something that the solar eclipse of August 21 illustrates in stunning detail. And though it's implausible, the destruction of that object would be devastating.

Supermoons occur when full moons coincide with the moon is closest to the earth in its orbit. The moment is what's called perigee. When this happens, the moon looks 30% brighter and 14% larger ...

According to Astronomy, people living near the oceans would see an immediate change in low and high tides, with their size decreasing by more than half. Tide change would dramatically impact ...