Astronomers have identified asteroid 2024 YR4 as the most likely sizable space rock to impact Earth, with a 3.1 percent chance of hitting on Dec. 22, 2032. While smaller than Apophis, 2024 YR4 could still cause significant damage if it were to strike a city. The asteroid's composition and size will determine the extent of the impact, with experts warning of potential airbursts and tsunamis if it were to hit the ocean or a coastline.

The good news: They've been wrong before.