However, if Asteroid 2024 YR4 does hit Earth, most people won’t even know it happened. "This is not a get-worried kind of situation," asteroid and comet expert Teddy Kareta told FOX Weather.

Scientists and governments had no idea how to respond, he says. A large asteroid strike could be catastrophic if it hits an area where humans live. We don't know exactly how big YR4 is yet ...