A pteraspidomorph (Sacabambaspis) swims in the Ordovician Ocean under the anachronistic gaze of two Quaternary island species: the giant non-flying galliform from New Caledonia Sylviornis neocaledoniae (right) and the dwarf hominin from Flores Homo floresiensis (left, compared to its ancestor H. erectus). Species appearing, evolving, migrating and finally becoming extinct on a planet in permanent change, notably geographical and climatic: life is not, and has never been, a bed of roses!
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