[itsybitsycoder]

Because mutations are random. Evolution doesn't result in the ideal designs for everything, just the best (or good enough) of the random mutations that happen. OTOH, if we were designed by something, why would the designer not use the optimal leg designs for all the jumping bugs?

[biomecha]

> if we were designed by something, why would the designer not use the optimal leg designs for all the jumping bugs?

Because:

- the designer is not that clever,

- the designer likes to play with its creatures,

- the designer is not alone,

- the designer forgot to update its creations,

- or simply because she does not care.

[swamp40]

Yes, my personal pet theory is that something really smart made a 3D printer-like life machine, and then gave it to thousands of other not-so-smart individuals - who then came up with all these crazy and inconsistent life forms on Earth.

Some designed Bengal Tigers, and others designed Aye Ayes.

[biomecha]

I guess everyone would like to have a chat with the one who came up with the monkey idea.