Save the people!: halting human extinction

Earth : a very brief history

Mass extinctions : the first four of five

Mass extinctions, continued : the fifth one got the dinosaurs

Homo sapiens : not the only humans

DNA bottleneck : that time humans almost went extinct

Asteroids : incominggggg!

Supervolcanoes : the blast from below

Disease : teeny tiny threats like bacteria and viruses

Over population : we live here, we eat here-until we don't!

War : the ultimate self-destruct button

Sun : we're gonna need stronger SPF

Outer space : supernovae, gamma-ray bursts, aliens

Global warming : who turned up the heat?

1.5°C to 2° C : just a wee bit warmer

We're doomed (JK, how to save the planet people).