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The latest volume of Biographical Memoirs celebrates scientific endeavours across all scales, from big questions about extra-terrestrial life, to the small matter of how a cell dies.   

The Mars Perseverance rover is the latest in a long line of attempts to map and understand the Red Planet. Rupert Baker finds some earlier examples in the archives of the Royal Society.

Keith Moore tells the story of Ralph Bagnold FRS and his travels through the seemingly impassable sand dunes of the Libyan Desert.