Where is everybody?

Nov 25, 2016, 12:00 AM

If life is common in the universe, where is it? What exactly are we looking for? And if it does exist, would it be 'intelligent?' Graihagh Jackson tackles Fermi's paradox - the contradiction between the lack of evidence and high probability estimates of alien civilisations - with Neil DeGrasse Tyson, Jim Al-Khalili and Dallas Campbell.