Baby tyrannosaurs were ‘size of Border Collie dog’ when taking first steps

26 Janvier, 2021, 16:17 | Auteur: Therese Cote
  • Paleontologists Fieldwork

They are among the largest predators ever to walk the Earth, but experts have discovered that some baby tyrannosaurs were only the size of a Border Collie dog when they took their first steps.

A team of paleontologists studied the fossilized remains of a dinosaur embryo, namely the jawbone and claw that were found in Canada and the United States, respectively.

His team also estimated that tyrannosaur eggs would have been about 17 inches long - a finding the researchers said could help to identify such eggs more easily in the future and gain greater insight into the nesting habits of the creatures.

They performed 3D scans of a 3-cm (1.2-in) section of jawbone from an embryonic Daspletosaurus tyrannosaur - found in Montana's Two Medicine Formation - along with a claw most likely from an embryonic Albertosaurus tyrannosaur, found in Alberta's Horseshoe Canyon Formation.

"Dinosaur babies are very rare", lead study author Greg Funston, a paleontologist at the University Edinburgh, told CNN, explaining that larger specimens are better represented in the fossil record because their bones were more durable. "It's a pretty big deal", he said.

L'incroyable annonce de l'ancien agent de Benzema sur un potentiel retour — OL
Mais ce n'est pas vrai. "(.) Revenir, porter le brassard, avec une équipe de jeunes à côté, ça peut faire de la magie". Et cela un peu avant les révélations de son ancien agent Karim Djaziri sur ses scies de revenir à Lyon tôt ou tard.

NBA, NBPA Discuss Holding All-Star Game In March
The NBA is still planning an "All-Star break" from March 5-10, and the second half of the regular season is set to begin March 11. The NBA awarded Indianapolis the 2024 All-Star Weekend to replace the loss of the event in 2021.

Moderna says COVID-19 vaccine protects against UK, South African variants
Of those cases, 10 reports of anaphylaxis or serious reaction to the vaccine, which is about eight per 100,000. The province will provide an update on the COVID-19 vaccination plan at Queen's Park Monday afternoon.

They were slightly smaller than their more famous cousin, Tyrannosaurus rex, which grew up to 40 feet in length, Funston said.

Further analysis showed that the tyrannosaurs were born with distinct physical traits, including "a pronounced chin" - making them look "remarkably like their parents", who could weigh up to 8 tons as adults, the researchers said.

The discovery could help settle debates over whether other specimens in the fossil record come from new species or younger specimens of known species, he added.

"These were hatching animals and may have been relatively active soon after they hatched", Vanston said.

Funston said he plans to try to produce scans of the remains at a higher resolution, to enable the study of tooth development, which could reveal how long the tyrannosaurs spent inside the eggs before hatching.

Conseillé:



Populaire

AMC gains investors, hopes to weather pandemic
AMC has yet to release its 2020 full-year financial results but posted a net loss of $3.6 billion in the first nine months of the year.

Italian Prime Minister Confirms To Cabinet That He Is Resigning: Government Source
The first was a fractious coalition between M5S and Salvini's League, which ended when the latter pulled out in August 2019. Conte , in power since 2018, quit after ex-PM Matteo Renzi pulled his Italia Viva party out of the governing coalition.

High Court directs Military, Police to vacate Bobi Wine's home
Museveni's tactics towards those who advocate for an inclusive democracy is unsafe and must be addressed by the global community". The opposition rejected the result, alleging fraud which the government denies.

Worst Cooks in America Season Pulled After Winner's Arrest for Child Murder
Among those posts were entries decrying "white privilege" while talking about her three adopted children, all of whom were white. Descriptions and highlights of episodes from season 20 were not listed on the Food Network website at the time of writing.

Unemployment rate soars to highest level for more than four years
Economists said the data showed the jobs market was holding up better than many forecasters had feared. British retailer Debenhams collapsed last month with the loss of thousands of jobs.

Le club doit de l’argent à plusieurs clubs… dont Bordeaux — Barça
On sait l'importante dette que possède le club, de plusieurs centaines de millions d'euros et peut-être même d'un milliard. En effet, on se souvient que l'été dernier, les Blaugrana avaient eu toutes les peines du monde à acheter Depay à l'OL.

De Niro, Boyega to star in Formula One movie
Veteran actor Robert De Niro and " Star Wars " franchise alum John Boyega have teamed up for Netflix's upcoming thriller " The Formula ".

Pope prays for Nigerian homeless man found dead near St. Peter's
The presentation took place at the pope's residence, the Casa Santa Marta, instead of at the Basilica, as had been planned. The text was released by the Vatican on the eve of the feast of St Francis de Sales, the patron saint of journalists.

Suarez strikes again as Atletico march on with Valencia win
Celta Vigo were held 1-1 against Eibar to extend their winless streak to five matches in all competitions. Elsewhere, Osasuna had a 3-1 win over Granada to climb to 17th, one point above the drop zone.

Greece, France to sign United States dollars 2.8 billion fighter jet deal
The next round of exploratory talks between Greece and Turkey will take place in Athens, diplomatic resources reported on Monday. Turkey and Greece resumed exploratory talks focused on a number of disputes in the Aegean Sea on Monday in Istanbul.