The threat of a newly discovered asteroid has risen slightly in the past few weeks, as the world’s telescopes rush to track its course. But the chance of an impact is still quite slim. New calculations suggest there's a 2% chance the space rock 2024 YR4 will smack Earth in 2032.

In recent weeks, scientists have said the threat of a recently discovered asteroid hitting Earth in 2032 has risen slightly, but how likely is the impact and what would happen if the asteroid struck the planet?