<p>Alan and Amanda debate the number of civilisations that might be out there, get the maths wrong, and argue about whether our biggest barriers to coexistence would be linguistic or… dietary.</p>

Alan and Amanda debate the number of civilisations that might be out there, get the maths wrong, and argue about whether our biggest barriers to coexistence would be linguistic or… dietary.

005 | Where are all the aliens?

Do you ever feel dizzy when you think about the incomprehensible scale of space? We call that feeling Cosmic Vertigo. Welcome to a head-spinning conversation between two friends about the sparkly -- and not so sparkly -- stuff in the sky.

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005 | Where are all the aliens?

005 | Where are all the aliens?

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