Over the course of 80 million years, they evolved into tractor-trailer sized, long-necked plant-eaters, like Apatosaurus, formerly known as Brontosaurus.

经过八千万年的演化，他们变成了长脖子的草食性恐龙，并且长得像拖拉机那么大了，就如迷惑龙，以前称雷龙，那么大。

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Between them they named 130 species, doubling the number known to science, though many were so hastily identified, and based on so few bones, that they turned out to be duplicates (such as the massive herbivore apatosaurus, a.k.a brontosaurus) or mix-ups (such as the three-horned triceratops, which Marsh swore was "one of the largest of American bovines").

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