Although the chances of impact are slim, Bennu is still one of the most potentially hazardous known asteroids in our solar ...

and may even have provided the right conditions for life on Earth. But as far as we know, no other bodies in the solar system exhibit plate tectonics today. Why is our world different?

The asteroid, designated 2024 YR4, jumped to the top of NASA's risk chart, with a slim but measurable chance of striking ...