October 5, 2022

Started Out as a Fish. How Did It End Up Like This?

2 min read


Ticktalk was first known to humans in 2004, when at least 10 specimens of skulls and other bones were found in ancient river beds in the Nunavut region of the Arctic. A team of biologists, including Neil Schubben of the University of Chicago, Ted Dashler of the Academy of Natural Sciences of Philadelphia, and Farsh Jenkins of Harvard University, presented their findings in two parts. Nature Papers In 2006

A local council of elders called the Inuit Qaujimajatuqangit Katimajiit was consulted, and they named it Tiktaalik, which translates to a large freshwater fish that lives in Athale, in Inuktitut. Fossils have since been returned to Canada.

Scientists have been searching for fossils like Ticktalk for decades. And where other fossils needed a little explanation, Tucktalk’s clear anatomy – (almost) a foot fish – made it a perfect icon of evolution, located squarely between water and land.

Even then, the fossil fish struck a popular nerve, which reached the heels of one’s case. case hearing In Pennsylvania who ruled against the teaching of creativity as an alternative to evolution in high school biology. For Dr. Schubin, the collective desire of society to throw a tick-tack back into the water is a bit of a relief: you’ll want to taste the fish only if you believe in evolution, “which is a beautiful thing to me.” They said.

When Ms. Deretsky photographed Tucktalk, she presented it with a submerged deer, as the back of the fossil was a mystery at the time. But in the years that followed, scientists have collected more than 20 specimens and observed more anatomy, including the joints of its back, hind wings, and skull.

In particular, computed tomography scans taken by Justin Lamberg, a researcher at Dr. Schuben’s laboratory, have allowed scientists to peek into rocks to see bones. Scans created 3-D models of these unseen parts of the ticket. Some scans revealed that the ticktalk had unexpectedly large hips (more like the ticktalek) and surprisingly large pelvic fins. The fish seemed to use itself, like a whale barrow, instead of just dragging itself by its forewings. All four wings To get around, like a jeep.

Other scans revealed. Delicate bones Of her breast feathers. In contrast to the symmetrical radius of the fish’s wings, the bones of the tick’s wings were markedly disproportionate, allowing the joints to bend in one direction. “We thought it was because these animals were interacting with the earth,” said Thomas Stewart, an evolutionary and progressive biologist at Penn State University.



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