The threat from space rock 2024 YR4 has surpassed that of Apophis, an asteroid feared by scientists 20 years ago. The danger remains low, but experts are estimating the damage that could be done.

The chance that a city-killer asteroid will impact Earth in 2032 is steadily rising. Here's what you need to know.

A near-Earth asteroid as wide as the Statue of Liberty is tall could strike Earth on Dec.22, 2032, alerting planetary defense groups at the United Nations.