Our Becka-Eric Genetic Chimera

Tuesday, June 3, 2008

All from an ugly looking fish

This is probably way off subject, but there are some pretty pictures at least. A new fossil was discovered in Australia and has been completely worked up and published by some scientists working at Australian museums and universities. The fossil is a very ancient extinct fish that was pregnant when it died. It is really obvious in the fossil, which looks like this:



And within the fossil you can see the babies that are labeled down below as "embryos".



Just kidding about the obvious part, I got no idea how you get an embryo out of that. In any case, the normal people drawing of all of that stuff up above is right here:



Human birth is really complicated with a bunch of parts, and it is generally believed that the live birth processes in our bodies were inherited from fish like this fossil. Therefore, this fossil is important to our understanding of when live birth (and all of the parts that go along with it) evolved - whenever this fish was around, live birth existed. Turns out this fossil is from the late Devonian, which was about 380 million years ago. So the things that Becka is going through right now evolved over 350 million years ago. Coooooooooool.

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