Where is everybody?
Shostak, S. (2019) 'Zoo hypothesis' may explain why we haven't seen any space aliens. https://www.seti.org/zoo-hypothesis-may-explain-why-we-havent-seen-any-space-aliens. Consulted: 23/07/19 The Fermi Paradox – Where Are All The Aliens? (1/2). (06/05/15) Kurzgesagt – in a nutshell. https://www.youtube.com/watch?v=sNhhvQGsMEc. Consulted 23/07/19 The Fermi Paradox Il – Solutions and Ideas – Where Are All The Aliens? ( 04/06/15) Kurzgesagt – in a nutshell. https://www.youtube.com/watch?v=1fQkVqno-uI. Consulted 23/07/19 Wall, M. (2012) 160 billion alien planets may exist in our Milky Way galaxy. https://www.space.com/14200-160-billion-alien-planets-milky-galaxy.html. Consulted: 22/07/19 Where be aliens? (19/11/16) exurb1a. https://www.youtube.com/watch?v=7cidUaUCb5M. Consulted: 24/07/19 Why Alien Life Would be our Doom - The Great Filter. (01/02/18) Kurzgesagt – in a nutshell. https://www.youtube.com/watch?v=UjtOGPJ0URM. Consulted: 23/07/19
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