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If we have difficulty defining ‘life’ on earth, how will we identify it on other planets?

What does it mean to be alive? Science, shockingly, still doesn’t have a consensus. For example, is it fair to ...
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Boltzmann brain: You may be living in your own simulated reality

The paradox of the Boltzmann Brain can really pull the rug from under you if you follow it to all ...
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In the search for aliens, we need ‘a robust definition’ of life

Even though we still struggle with finding a satisfactory definition of life, that doesn’t mean that we can’t think about ways that ...