Are there aliens?

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Essential information

Key stage: 
Key Stage 2, Key Stage 3, Key Stage 4, Post-16
Resource type: 
Video
Location: 
Royal Observatory
School subject: 
Astronomy, Science

Life began on the Earth around 3.5 billion years ago. Could life have evolved on other planets and if so where are they? Astronomers at the Royal Observatory Greenwich explain how we might detect them in this video.

Accompanying Resources