What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant corners of the universe, others right here on Earth." ...

Following is a transcript of the video. Early in the history of our solar system, something mysteriously knocked Earth slightly off its axis. So today we tilt at 23.5 degrees. But what would ...

Notably, a 1976 study found geological evidence showing that two of Earth's parameters — obliquity and precession, or changes in Earth's axial tilt and how the axis wobbles around itself, respectively ...

Earth is tilted on its axis, meaning that sunlight falls unevenly on the planet over the course of the year. This tilted axis is why Earth has seasons, and it creates the planet's three major ...

Simulations show that the Gulf Stream — which normally ... That's how quickly Earth rotates on its axis, from West to East. And that rotation is largely responsible for the distribution of ...

The word equinox comes from two Latin words meaning equal and night. That’s because on the equinox, day and night last almost the same amount of time — though one may get a few extra minutes, ...

The asteroid is hurtling towards us at a zippy 15,000 miles per hour, according to the space agency's Jet Propulsion Laboratory.