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 通过
Prices vary according to the quantity ordered.
2.be known as 被称为
China has always been known as a land of propriety and righteousness.
3.belonged to 属于
I realized that he and I belonged to different worlds.
4.look through 浏览；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；一块
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 直到那时
Up to that time he have be stayed with his uncle.
Up to that time, he had not believed in God.
俄亥俄大学生物学家南希·史蒂文斯（Nancy Stevens）在肯尼亚一家博物馆的木制抽屉里发现了一块有着巨大牙齿的岩石 。
她发现的“岩石”以及其他东西都是被忽视的化石 。它们被存放在首都内罗毕的肯尼亚国家博物馆 。这些化石来自地球上最大的食肉哺乳动物之一 。
这些化石属于一个名为Simbakubwa kutokaafrika的动物 。这只动物生活在2200万年前的非洲 。
史蒂文斯是在2010年发现这些化石的 。本月，她与合著者马修·博思(Matthew Borths)在《脊椎动物古生物学杂志》上发表了对这种动物的研究 。
这种动物的体型比现存的任何食肉哺乳动物都大 。它的头骨尺寸堪比犀牛头骨 。它的牙齿长度与香蕉无异 。其体重约一吨，身长2.5米 。
根据这项研究，这些化石大约是在1980年于肯尼亚西部发现的 。但是，这并没有被仔细核实过 。
Simbakubwa是6200万年前出现的动物种群中的一员 。也就是在恐龙灭绝后大约400万年，恐龙灭绝为哺乳动物在地球繁衍创造了环境 。这种动物出现在食肉的猫和狼之前 。
Simbakubwa一词在斯瓦希里语中的意思是“大狮子” 。然而，它不是猫科类 。它是其生态系统中最强大的动物捕猎者，很可能也是当时非洲陆地上最大的食肉哺乳动物 。