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Nature's latest report from the world of paleontology challenges the assumptions made by everyone until now about when animals first walked the earth.
This is footprint of early tetrapods. We have here, for example, digits1, impressions, and something like their pads. This is important.
I've been working personally in this field since the mid2 1990s. I've had over 20 publications in 'Nature', and this is the most important paper that I have ever worked on.
Footprints in a Polish quarry3 tell the tetrapods which walked the earth 20 million years before we thought any animal had left the sea.
This is your little friend, isn't it? Oh my word. Oh, wonderful. Look at that!
Until only a few months ago, this was an accurate model of a kind of animal paleontologists believed existed in the Middle Devonian Period, with fins4 but no proper feet. The new model is quite different.
Legs stick out and thighs5 can flex6 forwards. Then, it had to be an animal like this, a primitive7 land vertebrate, not a fish.
And if you are not sure you believe it, the Nature paper and the full film offer the proof.
点击收听单词发音
1 digits | |
n.数字( digit的名词复数 );手指,足趾 | |
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2 mid | |
adj.中央的,中间的 | |
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3 quarry | |
n.采石场;v.采石;费力地找 | |
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4 fins | |
[医]散热片;鱼鳍;飞边;鸭掌 | |
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5 thighs | |
n.股,大腿( thigh的名词复数 );食用的鸡(等的)腿 | |
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6 flex | |
n.皮线,花线;vt.弯曲或伸展 | |
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7 primitive | |
adj.原始的;简单的;n.原(始)人,原始事物 | |
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