Fleas were very large in size in Jurassic era

Researchers have found the fossils fleas of Jurassic era in China and have found that those were very large as compared to the present day fleas.

The present day fleas are of the size of 1-10 mm but the primitive fleas of Jurassic and Cretaceous era were 8-21 mm long. They have no jumping specializations and were lacking in smooth jaws of modern fleas as they were armored with saw-like projections in siphoning mouthparts.

“The mouthparts are certainly overkill for piercing the hides of early mammals and birds,” says Engel. “It really appears as though they were specialized for working their way into some heavy hides, such as those on dinosaurs.”

George Poinar, a palaeoentomologist at Oregon State University in Corvallis, agrees that without jumping legs, the fleas “would have to crawl or run to find a host”. He adds that “they could have attacked dinosaurs or possibly pterosaurs”.


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Fossils of tallest and fattest penguin have been reconstructed

Scientists have successfully reconstructed the bones of 25 million years old penguin. They have found that those Kairuku pnguins were the tallest and fattest of all the known penguins.

"Kairuku was an elegant bird by penguin standards, with a slender body and long flippers, but short, thick legs and feet," said co-author Dr. Dan Ksepka, from North Carolina State University, US.
"If we had done a reconstruction by extrapolating from the length of its flippers, it would have stood over 6ft tall. In reality, Kairuku was around 4ft 2ins tall or so."


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