What is CRISPR-Cas9? 

CRISPR-Cas9 is a genome editing tool that is creating a buzz in the science world. It is faster, cheaper and more accurate than previous techniques of editing DNA and has a wide range of potential applications.

An example of what CRISPR-Cas could be used for example is working out how fish evolved fins using the fossil Tiktaalik for example.

What is a Tiktaalik?


Tiktaalik /tɪkˈtɑːlk/ is a monospecific genus of extinct sarcopterygian (lobe-finned fish) from the late Devonian period, about 375 Ma (million years) ago, having many features akin to those of tetrapods (four-legged animals).[1]

Tiktaalik has a possibility of being a representative of the evolutionary transition from fish to amphibians. It is an example from several lines of ancient sarcopterygian fish developing adaptations to the oxygen-poor shallow-water habitats of its time, environmental conditions which are thought to have led to the evolution of tetrapods.[2]

It and similar animals may possibly be the common ancestors of the broad swath of all vertebrate terrestrial fauna: amphibians, reptiles, birds, and mammals.[3] The first well-preserved Tiktaalik fossils were found in 2004 on Ellesmere Island in NunavutCanada.

Further information can be found in a three-part TV series “Your Inner Fish,”, more information about the Fossils discovery can be found here:






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