Evolution on an Island Produced Shetland Pony Sized Elephants

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Ancient Elephants the Size of Shetland Ponies Once Roamed Sicily

by Elizabeth Gamillo/Smithsonianmag.com

Straight-tusked elephants (Palaeoloxdon antiquus) were among the largest mammals to ever live during the Pleistocene era. The elephants were so massive they may have reached almost 15 feet tall and weighed over 30,864 pounds. To put that into perspective, they could have easily rested their chin on the back of the modern-day African savannah elephant, Josh Davis writes for the Natural History Museum.

However, new fossil analysis suggests that the descendants of these colossal mammals shrunk down to 15 percent of its size in 40 generations when they migrated into Sicily, an island off the toe of Italy’s boot. The divergence created two types of miniature elephants—one species was as tiny as a Shetland pony. The study, published last month in Current Biology, showcases how rapid evolutionary changes can occur when animals are isolated on an island.

Evolution on islands is a quite intriguing field of science since it can be seen as an experiment of nature or evolution in action,” study author Sina Baleka, a paleogeneticist at McMaster University, tells the New York Times‘ Jeanne Timmons.

The researchers used 11 fossils from dwarf elephant specimens found on the island to find how the tiny elephants shrunk over time.   Read More:

 

Biography
Carol graduated from Riverside White Cross School of Nursing in Columbus, Ohio and received her diploma as a registered nurse. She attended Bowling Green State University where she received a Bachelor of Arts Degree in History and Literature. She attended the University of Toledo, College of Nursing, and received a Master’s of Nursing Science Degree as an Educator.

She has traveled extensively, is a photographer, and writes on medical issues. Carol has three children RJ, Katherine, and Stephen – one daughter-in-law; Katie – two granddaughters; Isabella Marianna and Zoe Olivia – and one grandson, Alexander Paul. She also shares her life with husband Gordon Duff, many cats, and two rescue pups.

Carol’s Archives 2009-2013
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1 COMMENT

  1. I’m sorry, but I just don’t “buy” the “science” of either the dating (with its hundred thousand year spread) or the fossilized DNA that’s supposed to tell what it’s descended from.
    Scientists are just now beginning to realize the true miracle of complex operation involved in the workings of “LIVING” DNA, let alone the making of grand leaps of “faith” in so-called “evolutionary” science based on rocks.
    About all they could possibly do, and I have my doubts about this, is to point to some general similarities in DNA structure; as in postulating they may of the same kind of animal, and that they know more from the shape and appearance of the fossil.
    But with the advanced understanding of DNA’s truely unfathomable working nature just now starting to be realized, there is no way the claims of that article could represent anything other than a tenuios hypothesis.
    No offense intended.

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