Richard Fortey, head of palaeontology at the Natural History Museum - Alamy ​Richard Fortey, who has died aged 79, enjoyed a long career as head of palaeontology at the Natural History ...
Fig.1: Tempo and mode in the body size evolution of Cambrian-Ordovician trilobites. Changes in maximum size (red) and mean size (blue) for each time slice, with lines and shading representing the mean ...
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Fig. 3: Phylogenetic based family-level body size evolution in Cambrian-Ordovician trilobites. (A) Ancestral state reconstruction of body size. (B) Evolutionary traitgram of trilobite body size. (C) ...
About half a billion years ago, a volcanic eruption near a shallow sea in what’s now Morocco preserved some of the most complete specimens ever found of buglike sea creatures called trilobites, ...
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