恐龍卡第 1238 張，共 2 027 張

Nanuqsaurus

名字的意思： “polar bear lizard”1

吃：肉暴龍類白堊紀晚期

Nanuqsaurus was a small, fierce tyrannosaur that lived in the ancient Arctic, where it was the top predator. It had a short snout and sharp teeth, and it hunted in a world with long, dark winters.1

生存年代

72 到 66 百萬年前5

白堊紀晚期

化石發現地

North Slope of Alaska, USA, in the Prince Creek Formation1

長度

5 到 9 m (16 到 30 ft)3 4

體重

500 kg 到 1.9 公噸 (1,100 到 4,200 lb)3

高度

2.9 m (9.5 ft)

估計值

最高速度

時速約 36 公里（22 英里）

跑步, 估計值

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？

估計值

牠有多重？

跟 1.5 台汽車一樣重

跟 2 台汽車排成一排一樣長跟 50 根香蕉頭尾相接一樣長跟 95 隻狗一樣重跟 380 顆西瓜一樣重跟 100 個幼兒園小朋友一樣重跟 59 個小學生一樣重跟 4 隻北極熊一樣重能在 10 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Nanuqsaurus 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)

Nanuqsaurus 時速約 36 公里 (22 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

Nanuqsaurus was small for a tyrannosaur, with an estimated skull length of only 600 to 700 millimeters (about 2 feet) in adults.1

It lived at a paleolatitude of about 80 to 85 degrees north, meaning it experienced months of continuous darkness in winter.3

Its name comes from the Iñupiaq word 'nanuq' for polar bear, because it was a top predator in a cold, seasonal environment.1

Nanuqsaurus had a distinctive skull feature: the first two teeth in its lower jaw were much smaller than the ones behind them, which helped it bite in a unique way.1

It was closely related to the famous Tyrannosaurus rex, but much smaller, possibly because food was scarce in its Arctic habitat.1

The only known fossil is a partial skull, found in 2006, and it was initially mistaken for a different dinosaur called Gorgosaurus.1

Nanuqsaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Nanuqsaurus 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 Nanuqsaurus 最常被問的問題

?How big was Nanuqsaurus?

Scientists first thought it was 5 to 6 meters long, but newer fossils suggest it may have grown to about 7 meters and weighed over 1.9 metric tons.3

?What did Nanuqsaurus eat?

As the top predator in its Arctic home, it likely hunted other dinosaurs like hadrosaurs and horned dinosaurs.3

?Did Nanuqsaurus have feathers?

Yes, it was likely covered in feathers for insulation against the cold.3

?Was Nanuqsaurus a dinosaur?

Yes, it was a theropod dinosaur and a close relative of Tyrannosaurus rex.3

?When did Nanuqsaurus live?

It lived during the Late Cretaceous, about 70 million years ago.4

?Why is it called Nanuqsaurus?

Its name means 'polar bear lizard' in Iñupiaq, because it was the top predator in the ancient Arctic.3

?Could Nanuqsaurus survive in the dark?

Yes, it lived through about 120 days of constant winter darkness each year and likely stayed in the Arctic year-round.3

?Is Nanuqsaurus bigger than a T. rex?

No, it was much smaller. T. rex was about 12 meters long, while Nanuqsaurus was only about half that size.4

迷思破解王

迷思： Some people think Nanuqsaurus was a baby Tyrannosaurus rex because it was small.

真相： Nanuqsaurus was a distinct species, not a baby. It had unique skull features and lived in the Arctic, while T. rex lived further south.1

給恐龍專家

學名: Nanuqsaurus
命名者: Fiorillo and Tykoski 20145
類群: 暴龍類
科 / 演化支: Tyrannosauridae5
分類: Theropoda > Tyrannosauroidea > Tyrannosauridae5
岩石的年代: 72 到 66 百萬年 (Maastrichtian)5
岩層: Prince Creek5
國家: 美國5
化石紀錄: The Paleobiology Database 收錄 1 筆5
發現: Nanuqsaurus was named by Anthony Fiorillo and Ronald Tykoski in 2014, based on a partial skull found in Alaska's Prince Creek Formation. The fossil was discovered in the Kikak-Tegoseak Quarry.1
仍有爭議: Scientists still debate why Nanuqsaurus was so small, with some thinking it was due to limited food in the Arctic, but others suggest it might have been a juvenile or a different factor.1