More than 95 million people are facing gripping cold Tuesday as a polar vortex sends temperatures plunging to record levels.

The large space rock, named 2024 YR4, could destroy a large city and kill millions of people if it smashed into the Earth in ...

New black-and-white pictures have emerged of 2024 YR4, the 'city killer' asteroid that has a 1-in-48 chance of smashing into ...

When it was first discovered, YR4 had a 1-in-83 chance of striking Earth. It increased to 1-in-67, then 1-in-53, then to 1-in ...