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Are scientists as preoccupied with sex as teenagers? You might get that impression after seeing the coverage this prehistoric fish is getting:
1) Fish fossil clue to origin of sex (includes video demo)
2) Fossil proves sex started 350 million years ago
3) Scientists Find First Animal That Had Sex
4) Study of fossils shows prehistoric fish had sex
The basic gist:
Remains of embryos entombed in their fish mothers’ wombs for 380 million years have been found in fossils from an ancient rock outcrop in Western Australia. The finding is a big deal because it suggests that sex goes way back.
The prehistoric fish, called placoderms, are found at the base of the vertebrate evolutionary tree (in a large group we humans also belong to), so it now looks like sexual intercourse, and the mating behaviors that go along with it, were more widespread in these ancient animals than previously thought…
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