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What are you to make out of headlines of supposed alien discoveries? In this video I remind you of cases in the past when scientists thought they'd discovered signs of alien life, yet their observations turned out to have a natural origin.

Correction to what I say at 3 minutes 33 seconds: The mission was Mariner 4, not Mariner 5. Sorry about that.

Many thanks to Jordi Busqué for help with this video http://jordibusque.com/

You can support us on Patreon: https://www.patreon.com/Sabine

0:00 Intro
0:44 Sponsor Message
2:04 Canals on Mars
4:07 Little Green Men
5:12 Life on Mars again
5:55 WTF
7:37 'Oumuamua
9:50 What do we learn from this?

#astrophysics #space #science