“There's a supermassive black hole at the center of every galaxy, and there are also smaller black holes that aren't necessarily in the center.”

“When stars run out of fuel, they start to collapse under gravity, and if they're sufficiently massive, they collapse to an infinitely dense point.”

“Not every star becomes a black hole at the end of its life; smaller stars can become white dwarfs instead.”

“Mass extinctions on Earth may have been caused by impacts from space, and there are theories suggesting a massive object could be responsible.”