Fossilized Pregnant Fish One Of First Animals To Have Sex
Thursday, February 26, 2009 - 05:21
in Paleontology & Archaeology
A pregnant fossil fish at the Natural History Museum in London has shed light on the possible origin of sex, according to a new study. Dating from the Upper Devonian period 365 million years ago, the adult placoderm fish Incisoscutum ritchiei is one of the earliest examples of a pregnant vertebrate and contains a five-centimetre-long embryo.