The head of planetary defense at the European Space Agency discusses 2024 YR4, an asteroid with a small chance of striking ...

YR4 has a roughly 2 percent chance of hitting Earth in 2032, and “is large enough to cause localized damage,” NASA says.

Over the next several weeks, astronomers will be looking closely at an asteroid called 2024 YR4 that could be as big as a ...

KYIV — The US has presented Ukraine with a revised deal for its rare earth minerals after the initial proposal was struck ...