Asteroid 2024 YR4 is big and dangerous enough that it has been dubbed a "city killer." There were concerns that the asteroid ...

Of all the asteroids that have imperiled the planet, 2024 YR4 is unparalleled. An Earth impact was eventually ruled out in ...

Initially, much uncertainty surrounded the flight path of the space rock known as 2024 YR4, a small asteroid that has recently become an object of much scientific attention. 2024 YR4, measuring ...