Duration
60 minutes
Series Info
Season 5 Episode 4 of 8
Quick Summary
The possibility of life on Mars in previous eras
About This Program
Once there was life on Mars - but scientists believe a series of devastating mass extinctions transformed a watery planet into a desert
How the Universe Works broadcasts on Discovery History +1 at 8:00pm, Tuesday, 9 December 2025.
Channel Numbers:
Sky HD782Sky274Virgin381