Arab Today, arab today footprints suggest tyrannosaurs were gregarious
Last Updated : GMT 23:12:04
Arab Today, arab today
Arab Today, arab today

Footprints suggest tyrannosaurs were gregarious

Arab Today, arab today

Arab Today, arab today Footprints suggest tyrannosaurs were gregarious

Skeletons of dinosaurs "Albertosaurus"
Ottawa - AFP

Scientists in western Canada have discovered the fossilized footprints of three tyrannosaurs that suggest these fearsome predators may have hunted in packs.
The sets of tyrannosaur footprints are the first ever to be found in proximity to one another and are the only clear evidence so far that these dinosaurs may have been social rather solitary animals.
"The evidence is as strong as you can get with any fossil evidence that tyrannosaurs were pack animals," Richard McCrea of the Peace Region Palaeontology Research Centre, who led the excavation, told AFP on Thursday.
"It shows that these were three animals travelling together, all going in the same direction," he said.
Previously, only individual tyrannosaur footprints have been uncovered in the United States, Canada and Mongolia.
The parallel tracks leading into a rock cliff near Tumbler Ridge, British Columbia indicate the three were walking in a group, "bearing southeast within an 8.5 meter-wide corridor," according to a study published by McCrea's team in the journal PLOS ONE.
The researchers cited "similarities in depth and preservation" of the tracks as proof that they were made by animals "walking concurrently in the same direction."
The three-toed footprints of these very large bipedal carnivores with powerful jaws and small clawlike front legs were discovered by a local guide and outfitter in 2011 in what would have been soft mud 70 million years ago.
Excavation, which is continuing, has uncovered seven footprints in all.
They are believed to have been covered up and preserved by volcanic ash, only to be exposed eons later by the erosion of the cliff.
The footprints -- each half a meter long -- belong to adult animals of different sizes. They predate the Tyrannosaurus Rex, but Albertosaurus and Daspletosaurus -- ancestors of Rex -- once roamed foothills east of the Rocky Mountains.
The discovery also provides valuable new information on how tyrannosaurs moved.
"Their gait was very narrow, with very little rotation of the foot," McCrea noted. "It's quite an efficient locomotion: very long strides, almost four meters.
"We had no idea they walked like that," he said.
"There's been speculation about their biomechanics but prior to the discovery of these trackways, all we had were bones, and theories about how their joints rotated and so on.
"Now we have trackways that we can use to put those hypotheses to the test.
"That's the next step."

 

arabstoday
arabstoday

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

Arab Today, arab today footprints suggest tyrannosaurs were gregarious Arab Today, arab today footprints suggest tyrannosaurs were gregarious

 



Arab Today, arab today

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

Arab Today, arab today footprints suggest tyrannosaurs were gregarious Arab Today, arab today footprints suggest tyrannosaurs were gregarious

 



Arab Today, arab today France defies terrorism through tourism

GMT 15:18 2017 Saturday ,20 May

France defies terrorism through tourism
Arab Today, arab today Mai Al-Jeddawi presents décor ideas for Ramadan
View News in Arabic - Culture: أخبار الثقافة والفنون
Arab Today, arab today
Arab Today, arab today

GMT 09:49 2017 Tuesday ,02 May

Girl barred from Malaysia chess competition

GMT 17:59 2017 Monday ,12 June

Designer Rania Adel reveals her new collection

GMT 08:48 2017 Saturday ,06 May

Climate science: Bad news gets worse

GMT 16:25 2017 Sunday ,04 June

“Suhoor” is basic meal for fasting

GMT 06:31 2015 Thursday ,04 June

Pluto's unruly moons

GMT 11:09 2017 Sunday ,25 June

HUAWEI P10 the ‘guru’ of portrait shots
Arab Today, arab today
Arab Today, arab today
 
 Arab Today Facebook,arab today facebook  Arab Today Twitter,arab today twitter Arab Today Rss,arab today rss  Arab Today Youtube,arab today youtube  Arab Today Youtube,arab today youtube
arabstoday arabstoday arabstoday arabstoday
arabstoday arabstoday arabstoday
arabstoday
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
arabstoday, Arabstoday, Arabstoday