Fickleness is an odd thing. Why change your mind for no good reason? Well, if you are a fish, and picking a mate, predators may well be that reason. Choosing a mate is hard enough, especially when you have to invest a lot in reproduction and females often invest the lion’s share in reproduction (perhaps a [...]
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So, you think you’re so clever with your lame old ball-and-socket joints? Beat this, weevils have evolved a sophisticated joint which joins their legs to their bodies with a screw-nut locking device. They have a screw-like ending to the leg end, and a nut-like socket that matches the thread on their screw legs, and it locks [...] |
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