Ancient Aquatic Roots? Echidnas May Have Crawled Out of the Water, Not Into It
In a surprising turnaround that defies conventional evolutionary hypotheses, recent research indicates that echidnas Australia’s mysterious, spiny, egg-laying mammals could have evolved from aquatic origins instead of terrestrial ones. This finding, released in PNAS, upends the textbook narrative for how scientists think about monotremes, the strange branch of mammals that comprises echidnas and platypuses. If ...
