The Universe - Season 4 - Eps 9: Liquid Universe
On alien planets, they rain from the sky as scalding iron. On distant moons, even at hundreds of degrees below zero, they slosh around in pristine lakes of methane. They can cover entire planets in miles-deep oceans of electrified hydrogen metal. Or erupt on alien worlds through miles-high geysers. They churn in the interiors of dead stars and even our own planet. They're so rare in the universe, they almost don't exist, but these are the magical liquids of our Liquid Universe.
About The Universe

Title: The Universe
First Air Date: 2007-05-29
Last Air Date: 2015-05-23
Status: Ended
Rating: 7.9/10 (from 170 votes)
Language: EN
Seasons: 10
Total Episodes: 88
Network: History H2
Genres: Documentary
Production Companies: Flight 33 Productions
Synopsis
From the planets to the stars and out to the edge of the unknown, history and science collide in a wondrous yet deadly adventure through space and time.
Cast

David Ackroyd

Erik Thompson