In 1950, while working at Los Alamos National Laboratory, physicist Enrico Fermi famously exclaimed to his colleagues over lunch: “Where is everybody?”

In a universe billions of years old, containing more than a billion trillion stars, he was struck by the fact that there was absolutely zero evidence of extra terrestrial life.

Also taking into account that the ongoing search for exoplanets tells us that on average, solar systems in our galaxy harbour at least one planet, it really does beg the question - where are all the aliens?

Jonathan Carroll-Nellenback, Astronomer at the University of Rochester and co-author of a new paper addressing the Fermi Paradox joins Jonathan to discuss.