News Services
27 February 2009
Vancouver Sun
Sex has been a fact of life for at least 380 million years, longer than previously thought. Internal fertilization was widespread among prehistoric fish living on ancient tropical coral reefs in the Devonian period, shows research published in the journal Nature this week. Zerina Johanson, a paleontologist at the Natural History Museum in London and colleagues in Australia, where the fossils were unearthed, deduced that copulation was common among armoured placoderms, extinct shark-like species, after finding embryos inside Materpiscis, Austroptyctodus and Incisoscutum placoderms.
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