Posted by: Rob Lester | January 22, 2012

“New” swimming style in an “old” fish

“Paleontologists used to think that one of the most common mosasaurs—Platecarpus—swam like eels, undulating their bodies back and forth. But another look at a complete fossil…made them think otherwise. Platecarpus actually swam like a shark, propelling itself forward using only its powerful tail, giving it an advantage over eel-like fish that have to move most of their bodies to get around. That means shark-like swimming evolved in the sea monsters 20 million years sooner than believed.” The title of this ScienceNow article is “Rapid Evolution for Ancient Sea Monsters.” Evolution MUST be more rapid than previously thought because the window of time for evolution to work its “magic” continues to shrink with virtually every knew discovery. This new evidence pushes the modern shark method of swimming further back in the evolutionary timeline. Modern morphology and modern behaviors keep appearing closer to the beginning. Maybe one day they will get all the way back to the creation week! This research further proves just how hard it is to determine behavior from bones. This should also encourage us to take a grain of salt with each new serving of bold assertions by paleontologists and anthropologists. For example, when say they are certain that australopithecines like “Lucy” walked upright (even though no feet were ever found). This is yet another in an endless series of evolutionary assumptions proven wrong by actual scientific evidence. More will surely follow.

http://news.sciencemag.org/sciencenow/2010/08/scienceshot-rapid-evolution-for-.html?ref=hp

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