The evolution of SARS-CoV-2 remains poorly understood. Theory predicts a group-structured population with selection acting principally at two levels: the pathogen individuals and the group of ...
In the 1800s, a conflict between the founding fathers of evolution divided the community. Charles Darwin believed sexual selection drove the variation in butterfly colors and patterns of males, while ...
Skeletons of the early horse-relative Eohippus (left) and modern Equus (right). From Animals of the Past by Lucas. During the early 20th century many biologists were considering a variety of ...
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