Gresham College Lectures

Harbingers of Doom?

• Gresham College

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0:00 | 1:01:31
Though a beautiful sight in our heavens, comets were once thought to be evil vapours burning up in our atmosphere. However, we now know that they have brought organic material and water to our planet Earth so helping to lay the foundations of life. But, equally, one could bring about the end of...

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