恐龍卡第 1849 張，共 2 027 張

Tyrannosaurus

名字的意思： “tyrant lizard”1

吃：肉暴龍類白堊紀晚期

Tyrannosaurus rex was one of the biggest meat-eating dinosaurs that ever lived. It stomped across western North America about 69 to 66 million years ago, at the very end of the Age of Dinosaurs. With its huge skull, powerful legs, and tiny arms, it was the king of its prehistoric world.1

生存年代

84 到 66 百萬年前5

白堊紀晚期

化石發現地

western North America, especially the USA (Colorado, Montana, New Mexico, North Dakota, South Dakota, Wyoming) and Canada (Alberta, Saskatchewan)5 1

長度

12.3 到 13 m (40 到 43 ft)1

體重

8 公噸到 8.8 公噸 (17,600 到 19,400 lb)1

高度

3.7 到 4 m (12 到 13 ft)1

最高速度

時速約 24 公里（15 英里）

跑步: Dececchi et al. 2020; Sellers et al. 2017

牠生活在什麼時候？

三疊紀

侏羅紀

白堊紀

2 億 5200 萬年前20114566，小行星撞地球

牠有多大？

牠有多長？

牠有多高？

牠有多重？

跟 6 台汽車一樣重

跟 3 台汽車排成一排一樣長跟 72 根香蕉頭尾相接一樣長跟 1.5 頭大象一樣重跟 1800 顆西瓜一樣重跟 11 整班小學生一樣重跟 20 隻北極熊一樣重能在 15 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Tyrannosaurus 跟「你」比起來有多大？

只是在你的瀏覽器裡算算數學。什麼都不會被儲存或傳送出去。

牠有多快？

走路的人 時速約 5 公里 (3 mph)

騎腳踏車的小朋友 時速約 12 公里 (7 mph)

Tyrannosaurus 時速約 24 公里 (15 mph)

一匹飛奔的馬 時速約 65 公里 (40 mph)

一隻獵豹 時速約 100 公里 (62 mph)

酷東西

趣味知識

Tyrannosaurus had the most powerful bite of any land animal ever, with a force of 35,000 to 57,000 newtons in its back teeth.1

Its arms were very short but surprisingly strong, with two clawed fingers on each hand.1

The first Tyrannosaurus rex fossil was a tooth found in Colorado in 1874, but the animal wasn't named until 1905.1

A set of footprints from Wyoming shows that a young Tyrannosaurus walked at a speed of about 2.8 to 5 miles per hour.1

Tyrannosaurus lived on an island continent called Laramidia, which was separated by a shallow sea from the eastern part of North America.1

Some scientists think Tyrannosaurus may have started appearing as early as the middle Campanian age, about 83 million years ago.5 1

Tyrannosaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Tyrannosaurus 可能的樣子。這只是猜測：真正的動物可能長得不一樣，也沒有人知道牠真正的顏色。

你們都在問

關於 Tyrannosaurus 最常被問的問題

?How big was Tyrannosaurus?

About 12 to 13 metres (40 to 43 feet) long, 3.7 to 4 metres (12 to 13 feet) tall at the hip, and weighed up to 8.8 tonnes (9.7 tons).1 3

?What did Tyrannosaurus eat?

It was a meat-eater that hunted large dinosaurs like Edmontosaurus and Triceratops, and probably also scavenged. Its powerful jaws and serrated teeth could crush bone.4 3

?How fast could Tyrannosaurus run?

Up to about 24 km/h (15 mph), about as fast as a grown-up riding a bike. T. rex was too heavy to really run like a horse, so most scientists think it moved with a big, fast power walk. That was still fast enough to catch other large dinosaurs.4 3

?Why were Tyrannosaurus arms so small?

Nobody knows for sure. One idea is that as its head grew bigger, the arms got shorter to keep the dinosaur balanced. They were still very strong and had two claws.4 3

?When did Tyrannosaurus live?

It lived about 69 to 66 million years ago, at the very end of the Cretaceous Period, just before the dinosaurs went extinct.1 4

?Where did Tyrannosaurus live?

It lived in western North America, on an island continent called Laramidia. Fossils have been found in the United States (like Montana and Wyoming) and Canada.1 4

?Was Tyrannosaurus the biggest meat-eating dinosaur?

It was one of the largest land predators ever, but some other dinosaurs like Giganotosaurus and Spinosaurus were similar in size. T. rex was the biggest predator in its own time and place.4 1

?Did Tyrannosaurus have feathers?

Some scientists think young T. rex may have had a light covering of feathers, but adults probably had mostly scaly skin. No direct fossil feathers have been found on T. rex.1

?How strong was Tyrannosaurus bite?

It had the most powerful bite of any land animal ever, with a force of 35,000 to 57,000 newtons in its back teeth. That is a very strong bite.1

?What does Tyrannosaurus rex mean?

Tyrannosaurus means 'tyrant lizard' in Greek, and rex means 'king' in Latin. So the full name means 'King of the Tyrant Lizards.'4 3

迷思破解王

迷思： Tyrannosaurus rex was just a slow scavenger that only ate dead animals.

真相： Most paleontologists now agree that T. rex was an active predator that hunted live prey, though it also scavenged when it had the chance.1

給恐龍專家

學名: Tyrannosaurus
命名者: Osborn 19055
類群: 暴龍類
科 / 演化支: Tyrannosauridae5
分類: Theropoda > Tyrannosauroidea > Tyrannosauridae5
岩石的年代: 84 到 66 百萬年 (Campanian / Maastrichtian)5
岩層: Hell Creek, Lance, Denver5
國家: 美國, 加拿大, 俄羅斯, 墨西哥, 中國5
化石紀錄: The Paleobiology Database 收錄 87 筆5
又名: Dinotyrannus, Dynamosaurus, Manospondylus, Stygivenator （舊名稱現在也算作同一種動物）5
發現: Barnum Brown of the American Museum of Natural History found the first partial skeleton in Wyoming in 1900, and a more complete one in Montana in 1902. Henry Fairfield Osborn named it Tyrannosaurus rex in 1905.1 2
仍有爭議: Scientists still debate whether some smaller tyrannosaur fossils belong to a separate genus called Nanotyrannus or are just young Tyrannosaurus rex.1