#11 - As the world cooled down 随着世界的冷静

1.Before the world started to cool 30 million years ago, palm trees grew almost everywhere - but they became rare.
These trees had thrived in warm, wet conditions. But as Earth cooled, other plants took over, such as magnolias, pines, oaks, and birch. These changes meant that animals changed too.

2.Pyrotherium means "fire beast', but not because this plant eater could walk through fire.
Its fossils were found in layers of ash from an ancient volcano in Argentina, South America. The volcano probably erupted, and its fumes and ash suffocated and burned all the animals nearby. Pyrotherium was about as big as a cow and looked like a combination of a pig and a short-tusked elephant.

3.Many prehistoric animals have exciting names - Brontotherium means "thunder beast".
Where the fossils of Brontotherium were found in North America, local people thought they were bones of the gods. They thought that these gods rode chariots across the sky and started thunderstorms, which led to the animal's name.

V Brontotherium was somewhere in size between a rhino and an elephant. Males use the U-shaped horn on their snouts in fighting competitions. V

4.Andrewsarchus was a real big-head!
At one meter long, it had the biggest head of any hunting mammal on land, and its strong jaws were filled with sharp, pointed teeth. Its whole body was larger than a tiger of today. Andrews arches probably lived like a hyena, crunching up bones and gristle from dead animals. It belonged to a mammal group that was mostly plant eaters. It lived 30 million years ago in what is now the deserts of Mongolia, Asia.

V Andrewsarchus was the biggest meat-eating land animal ever to have lived. V

5.Some animals had horns as tall as people!
Arsinoitherium's two massive horns looked like powerful weapons, but they were light, fragile and made of fragile bone This plant eater lived in northern Africa about 35 million years ago. It was almost as big as an elephant and may have been an ancient cousin of the elephant group.

V The horns on Arsinoitherium's head were hollow and may have been used to make mating calls. V

在三千万年前世界开始冷却之前，棕榈树几乎遍布各地，但却变得稀少。
这些树木在温暖潮湿的条件下蓬勃发展。但随着地球冷却，其他植物接管，如木兰，松树，橡树和桦木。这些变化意味着动物也改变了。

火箭是指“火野兽”，但不能因为这种食物可以走火。
它的化石被发现在阿根廷，南美洲的一座古老的火山中。火山可能爆发，其烟雾和灰烬窒息烧毁了附近的所有动物。红火腿与牛一样大，看起来像一只猪和一只短大象的组合。

许多史前动物有令人兴奋的名字 - Brontotherium是指“雷鸣兽”。
在北美发现Brontotherium的化石的地方，当地人认为他们是神的骨头。他们认为这些神骑着战车穿过天空，开始雷暴，这导致了动物的名字。

V Brontotherium的大小在犀牛和大象之间。男性在他们的鼻子上使用U形号角进行比赛。 V

安德鲁斯库斯是一个真正的大头！
在一米长的时间里，它有最大的头部，任何狩猎哺乳动物在陆地上，其强大的下巴充满尖锐的尖牙。它的全身大于今天的老虎。安德鲁斯拱门可能像鬣狗一样生活，从死亡的动物身上抓起骨头和。。声。它属于主要是植物食用者的哺乳动物组。它在三千万年前生活在现在的蒙古亚洲的沙漠中。

V Andrewsarchus是有史以来最大的吃肉地的动物。 V

一些动物的角与人一样高！
Arsinoitherium的两个巨大的角子看起来像是强大的武器，但它们轻巧脆弱，由脆弱的骨头制成。这种植物食者大约在3500万年前住在北非。它几乎和大象一样大，可能是大象组的古老表哥。

V Ar骨头上的角是中空的，可能已被用来进行交配。V