Dinossauros eram cobertos de penas para isolamento térmico
The majority of dinosaurs were covered with feathers or had the potential to grow feathers. A discovery of 150 million year-old fossils in Siberia indicates that feathers were more widespread among dinosaurs than previously thought. The details have been published in the Journal Science.
Reporter: Pallab Ghosh
The creature was about a metre long with a short snout, long hind legs, short arms and five strong fingers. Until now, fossilised evidence of feathery dinosaurs has come from China, and from a meat-eating group called theropods.
The latest discovery – in Russia – is from a completely separate group of plant-eating dinosaurs called ornithischians.
The new find takes the origin of feathers millions of years further back in time than had previously been thought. And, according to the researchers, completely changed ideas about how dinosaurs evolved.
Instead of thinking of them as dry, scary scaly creatures, a lot of species, especially when very young, actually had a fluffy, downy covering like feathers on a chick, they say. And did so when dinosaurs first emerged.
snout - nose and mouth of an animal (a parte do animal que compreende o nariz e a boca, focinho)
hind - the back part of an animal's body (a parte de trás do corpo de um animal, traseiro)
evidence - information which shows something is true (prova, evidência, que comprova a veracidade de algo)
evolved - changed gradually over time (evolveu, sofreu alteração com o passar do tempo)
scaly - covered in hard, flat pieces of skin (coberto de uma camada de pedaços duros e lisos de tecido de pele, escamoso, coberto de escamas)
downy - covered with soft feathers or hair (coberto com penas ou pelos macios)
emerged - appeared (emergiu, surgiu, apareceu)