The Natural Selection is back! This week we talk all about why The Ordovician blew a little hot and cold, why the great dying was great news for us, and which pigeon once blocked out the sun.

In this episode we talk about:

Common Sydney octopuses (Octopus tetricus)

jacobin hummingbirds (Florisuga mellivora)

Titanoboa (Titanoboa cerrejonensis)

Passenger pigeon (Ectopistes migratorius)