Failure to Adapt: Why Giant Sea Dragons Got Extinct
Ichthyosaurs rapidly evolved a large range of forms and sizes early in their evolution, but after a bottle neck at the end of the Triassic, show much slower rates and more restricted variety.
(Picture: Dr Ben Moon & Dr Tom Stubbs)
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![Dr. E. Poonguzhali has successfully transferred commercially available starting materials to medicinally important 2-acylbenzo[b]thiophenes in the presence of copper acetate & tetrabutylammonium chloride catalytic system.](https://cdn1.vogel.de/ZK7wqjVy7Ps1OSwUs5tXgrNZGEE=/288x162/smart/filters:format(jpg):quality(80)/images.vogel.de/vogelonline/bdb/1964500/1964559/original.jpg "Dr. E. Poonguzhali has successfully transferred commercially available starting materials to medicinally important 2-acylbenzo[b]thiophenes in the presence of copper acetate & tetrabutylammonium chloride catalytic system.")
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/cdn4.vogel.de/infinity/white.jpg "Ichthyosaurs rapidly evolved a large range of forms and sizes early in their evolution, but after a bottle neck at the end of the Triassic, show much slower rates and more restricted variety.")
