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说起恐龙有两个脑子,你一定会觉得奇怪。没错,马门溪龙、雷龙、梁龙就是这类恐龙。也许一个脑子不够用,所以它们就多长了一个“脑子”。这类恐龙有个共同的特点,就是身躯特别大,而脑袋特别小。以马门溪龙为例,估计它活着的时候有四五十吨重,而脑子的质量仅有500克左右。这么小的一个脑子,却能指挥一个大得惊人的身体,这实在叫人难以理解。原来,马门溪龙的臀部脊椎上,有一个神经系统叫作“后脑”,正是这个东
Speaking of dinosaurs have two brains, you will certainly find it strange. That’s right, Mamenchik Dragon, Brontosaurus, and Diplodocus are these dinosaurs. Maybe a brain is not enough, so they grow a “brain.” The common feature of these dinosaurs is that they have a particularly large body and a particularly small head. To Mamenchisaurus, for example, it is estimated that when it has forty or fifty tons, and the quality of the brain is only about 500 grams. Such a small brain, but can command a big amazing body, which is really hard to understand. The original, Mamenchiro dragon’s buttocks spine, there is a nervous system called “hindbrain”, it is this East