Out of a Drawer Comes a Vicious Ancient Beast
Ohio University biologist Nancy Stevens was looking through a drawer of a wooden container at a museum in Kenya when she saw a piece of rock with extremely large teeth.
She knew immediately she had come across something important.
The "rock" and other things she found were overlooked fossils. They were stored at the National Museums of Kenya, in the capital city of Nairobi. The fossils came from one of the largest meat-eating mammals ever to walk the Earth.
They belonged to an animal known as Simbakubwa kutokaafrika. It lived in Africa 22 million years ago.
Stevens came across the fossils in 2010. This month, she and co-writer Matthew Borths published their research about the animal in the Journal of Vertebrate Paleontology.
The animal was bigger than any meat-eating mammal alive today. Its skull was the size of a rhino's skull. Its teeth were as large as bananas. It weighed about one ton and was 2.5 meters long.
According to the research, the fossils were found around 1980 in western Kenya. But, they were never closely examined.
Stevens said, "Most of the specimens that I study are quite small, so you can imagine my surprise when I opened a drawer that I hadn't examined yet, and saw the enormous teeth."
Simbakubwa was a member of a animal group that appeared 62 million years ago. That was about 4 million years after the extinction of the dinosaurs, which created an environment for mammals to take over. The animal came before meat-eating cats and wolves.
It became extinct about 9 million years ago, researchers say.
Simbakubwa's name means "big lion" in the Swahili language. However, it is not a cat. It was the largest animal hunter in its ecosystem, and was probably the largest meat-eating land mammal in Africa up to that time.
I'm Susan Shand.
1.According to 通過
Prices vary according to the quantity ordered.
2.be known as 被稱為
China has always been known as a land of propriety and righteousness.
3.belonged to 屬于
I realized that he and I belonged to different worlds.
4.look through 瀏覽；看穿
Peter starts looking through the mail as soon as the door shuts.
5.Ohio University biologist Nancy Stevens was looking through a drawer of a wooden container at a museum in Kenya when she saw a piece of rock with extremely large teeth.
a piece of 一片；一塊
He ticked off my name on a piece of paper.
Someone had played a trick on her, stretched a piece of string at the top of those steps.
6.It was the largest animal hunter in its ecosystem, and was probably the largest meat-eating land mammal in Africa up to that time.
up to that time 直到那時
Up to that time he have be stayed with his uncle.
Up to that time, he had not believed in God.
俄亥俄大學生物學家南?！な返傥乃梗∟ancy Stevens）在肯尼亞一家博物館的木制抽屜里發現了一塊有著巨大牙齒的巖石 。
她發現的“巖石”以及其他東西都是被忽視的化石 。它們被存放在首都內羅畢的肯尼亞國家博物館 。這些化石來自地球上最大的食肉哺乳動物之一 。
這些化石屬于一個名為Simbakubwa kutokaafrika的動物 。這只動物生活在2200萬年前的非洲 。
史蒂文斯是在2010年發現這些化石的 。本月，她與合著者馬修·博思(Matthew Borths)在《脊椎動物古生物學雜志》上發表了對這種動物的研究 。
這種動物的體型比現存的任何食肉哺乳動物都大 。它的頭骨尺寸堪比犀牛頭骨 。它的牙齒長度與香蕉無異 。其體重約一噸，身長2.5米 。
根據這項研究，這些化石大約是在1980年于肯尼亞西部發現的 。但是，這并沒有被仔細核實過 。
史蒂文斯稱：“我研究的大多數標本體型都很小，所以你可以想象，當我打開一個抽屜，看到那些巨齒時，我有多驚訝 ?！?br />Simbakubwa是6200萬年前出現的動物種群中的一員 。也就是在恐龍滅絕后大約400萬年，恐龍滅絕為哺乳動物在地球繁衍創造了環境 。這種動物出現在食肉的貓和狼之前 。
Simbakubwa一詞在斯瓦希里語中的意思是“大獅子” 。然而，它不是貓科類 。它是其生態系統中最強大的動物捕獵者，很可能也是當時非洲陸地上最大的食肉哺乳動物 。