The Transitional Fish-to-Land Fossil

tiktaalik_cropped

[I]f life on Earth originated in water, then there must have once been fish species possessing primitive limbs, which enabled them to spend some part of their lives on land. And these species, in turn, must be the ancestors of four-limbed, land-living vertebrates like us.

Tiktaalik roseae, a 375 million-year-old Devonian period specimen [was] discovered in the Canadian Arctic by paleontologist Neil Shubin and his colleagues. Tiktaalik, explains Shubin, is an “anatomical mix between fish and a land-living animal.”

“It has a neck. No fish has a neck. When you look inside the fin, and you take off those fin rays, you find an upper arm bone, a forearm, and a wrist.”

06_EP01_ARCTIC.cropped

Via Mother Jones.

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About Heretic

I design video games for a living, write fiction, political theory and poetry for personal amusement, and train regularly in Western European 16th century swordwork. On frequent occasion I have been known to hunt for and explore abandoned graveyards, train tunnels and other interesting places wherever I may find them, but there is absolutely no truth to the rumor that I am preparing to set off a zombie apocalypse. Nothing that will stand up in court, at least. I use paranthesis with distressing frequency, have a deep passion for history, anthropology and sociological theory, and really, really, really hate mayonnaise. But I wash my hands after the writing. Promise.

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