Adventures in Space and Time episode 2

Brian Cox's Adventures in Space and Time episode 2: Brian Cox looks at our attempts to answer one of the most profound questions we can ask – are we alone in the universe? With scientists sending space probes to the furthest reaches of our solar system and beyond, the scientific search for alien life has begun.
Last Science posts on HDclump.com:
https://hdclump.com/the-story-of-science-episode-3-how-did-we-get-here/
https://hdclump.com/the-story-of-science-episode-2-what-is-the-world-made-of/
https://hdclump.com/the-story-of-science-episode-1-what-is-out-there/
https://hdclump.com/the-story-of-electricity-episode-3-revelations-and-revolutions/
https://hdclump.com/the-story-of-electricity-episode-2-the-age-of-invention/
https://hdclump.com/the-story-of-electricity-episode-1-spark/
https://hdclump.com/secrets-of-the-super-elements/
https://hdclump.com/the-artificial-intelligence-race/
https://hdclump.com/v-day-volcanic-planet/
https://hdclump.com/beautiful-equations/
https://hdclump.com/mysterious-world-of-maths-episode-3/
https://hdclump.com/magic-numbers-hannah-frys-mysterious-world-of-maths-episode-2/
https://hdclump.com/magic-numbers-hannah-frys-mysterious-world-of-maths-episode-1/
https://hdclump.com/do-we-really-need-the-moon/
https://hdclump.com/pluto-back-from-the-dead/