Discovered late last year, the asteroid 2024 YR4 was predicted at one point to have a 3% chance of smacking Earth in 2032.

Here, we expand on our Feb. 2 view that “Trump’s Iron Dome strategy echoes Reagan’s SDI missile defense vision.” ...

A group of astronauts whizzing around Earth from orbit are getting some pretty spectacular views of our planet's poles – and SpaceX is sharing a look.