Why does the Earth spin? Sara H., age 5, New Paltz, New York A globe was the first thing I ever bought with my own money. I was maybe 5 years old, and I was really excited to take it home.

Prior to that, the core's spin had been accelerating. The findings add to the mystique of the most inscrutable part of our world, Vidale said. Literature and lore involving Earth's core have ...

While Agnew's study suggests we have more time before facing this worrying unknown, it's worth noting that Earth's spin is very difficult to predict, and the new study is not necessarily a ...