How the turtle got its shell: Amazing fossils are solving the mystery
29 April 2020
For years, the oldest turtle fossils we could find had fully formed shells. Now, more primitive fossils are revealing the strange tale of how turtle shells evolved
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Premium
What four coronaviruses from history can tell us about covid-19
29 April 2020
Four coronaviruses cause around a quarter of all common colds, but each was probably deadly when it first made the leap to humans. We can learn a lot from what happened next
Is the universe conscious? It seems impossible until you do the maths
29 April 2020
The question of how the brain gives rise to subjective experience is the hardest of all. Mathematicians think they can help, but their first attempts have thrown up some eye-popping conclusions
