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探索发现: 冰期绿洲 Ice Age Oasis(18)
同时,巨型地懒和乳齿象一样,为了补充他们庞大体型的能量消耗,他们必须基本上一天到晚地进食。这可能就是冰河时代,但是到了中午,气温则迅速上升,另一只捕猎者也来到了泉水处饮水——令人闻风丧胆的剑齿虎。2013-10-11 编辑:Andersen 标签: 我来听写
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探索发现: 冰期绿洲 Ice Age Oasis(17)
如今,这里同样迎来了另一批大型来访者。这是一群乳齿象,它们由雌性头目带领着,刚刚从北部几百英里远的地方迁徙回来,它们每年都会迁徙一次。2013-10-09 编辑:Andersen 标签: 我来听写
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探索发现: 冰期绿洲 Ice Age Oasis(16)
这引起了其他的一些巨大变化。海平面越降越低,内陆水位也是一样。佛罗里达的淡水都从多孔的石灰岩中流走。小水池和泉水都干涸了。佛罗里达处于干旱的边缘。动物们必须长途跋涉以寻找食物和水源。因此,每年乳齿象都是迁徙都更加湿润的地区。2013-09-13 编辑:Andersen 标签: 我来听写
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探索发现: 冰期绿洲 Ice Age Oasis(15)
会不会是因为极度缺水使得乳齿象进行了这么长距离的迁徙?这个谜团的另一条线索位于海洋深处。2013-09-06 编辑:Andersen 标签: 我来听写
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探索发现: 冰期绿洲 Ice Age Oasis(14)
在奥西拉市发现的头骨下面发现了一些从冰河时代遗留下来的粪便。粪便中包含着植物化石,这告诉我们,在13000多年前,乳齿象的食物便是树木和草的混合物。2013-09-04 编辑:Andersen 标签: 我来听写
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探索发现: 冰期绿洲 Ice Age Oasis(13)
尽管它的名字叫做“大沼泽地”,但是这片沼泽在冰河时代并不存在。那史前的佛罗里达到底什么模样?在佛罗里达北部的一个地区,我们能够发现比其他地方更多的冰河时代的痕迹。这就是尤喜拉河,在这里,幽暗的河水缓慢地流淌着。2013-08-30 编辑:Andersen 标签: 我来听写
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探索发现: 冰期绿洲 Ice Age Oasis(12)
他们能够长到3米长,重量可与3个成年人的体重相当。但是在冰河时代的北美洲,巨型陆龟体型甚至更加巨大。佛罗里达现在也有乌龟,但是他们的体型很小。这就是穴居沙龟。2013-08-29 编辑:Andersen 标签: 我来听写
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探索发现: 冰期绿洲 Ice Age Oasis(11)
It's likely giant ground sloths used their claws in a similiar way to hook branches and pull them within reach. Like tree sloths, they were vegetarians and probably not fussy about what they ate2013-08-21 编辑:Andersen 标签: 我来听写
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探索发现: 冰期绿洲 Ice Age Oasis(10)
This is the Virginia opossum, a tree dweller found throughout many of the southern states. It's the only North American marsupial.2013-08-15 编辑:Andersen 标签: 我来听写
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探索发现: 冰期绿洲 Ice Age Oasis(9)
The cold climate conifer forests of the north displaced broadleaved woodlands. Plants and animals were gradually pushed south to find a warmer climate.2013-08-14 编辑:Andersen 标签: 我来听写
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探索发现: 冰期绿洲 Ice Age Oasis(8)
But how did one man and a spear produce the huge force behind this blow? The answer lies with small bits of ivory like this. They were once part of an atlatl, or spear thrower.2013-08-06 编辑:Andersen 标签: 我来听写
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探索发现: 冰期绿洲 Ice Age Oasis(7)
But most significant of all, the jaguar has a tell-tale trademark. Instead of going for the neck or snout like most cats do, it kills with a crushing bite through the skull into the brain.2013-07-31 编辑:Andersen 标签: 我来听写
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探索发现: 冰期绿洲 Ice Age Oasis(6)
These holes are the unmistakable hallmark of a violent death. Their shape suggest they were made by the teeth of a big cat, but which one?2013-07-29 编辑:Andersen 标签: 我来听写
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探索发现: 冰期绿洲 Ice Age Oasis(5)
But the glyptodont wasn't a reptile. So what was it? There is a relative of the glyptodont that’s still alive today. 但是雕齿兽却并不是爬行动物。那它又属于什么动物呢?如今还存活着一种与雕齿兽存在“血缘关系”的动物。2013-07-24 编辑:Andersen 标签: 我来听写
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探索发现: 冰期绿洲 Ice Age Oasis(4)
At first sight, manatees might look like seals or dolphins. But in fact, some of their closest relatives live on land. These toenails are the giveaway, remarkably similar to those of elephants.2013-07-23 编辑:Andersen 标签: 我来听写
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