What single animal or plant trait would you want humans to have if given the chance to evolve?

A renewed ability to produce vitamin C and photo-synthetic skin.

I like the idea of being able to grow your own food right off of your body, like an apple tree.

I think that being able to regenerate a body part like a star fish/sea star would be handy.

Here you go: camouflage

Photosynthesis sounds like a great advantage, as does the ability to take nutrients directly from the soil. I love the idea of flying and of being able to race on all fours. Better eyesight, better hearing, better sense of smell—all pluses.

But if I could really adopt any trait, I think I’d like to be able to relax and be utterly comfortable, like a cat, who never worries about the future or broods about the past and can nap anywhere.

The ability to swim on the surface of the water using only my feet while my trainer throws me a sardine.;)
Is that too much to ask??

Flight! I can’t believe I’m the 8th person posting and nobody has said it yet.
I feel that this should be in the “Social Section”. Way to change that?

@dxs, except for me.

Section is the questioner’s choice and indicates the kind of answers he or she wants.

@Jeruba
Sorry, totally skipped over that

Ampllulae of Lorenzini. Sharks have them and they are an organ that allows them to sense electric fields so they can hunt their prey. We would need to be adapted to water life, but it’d be so awesome!

I’ve read that bowhead whales can reach ages of 150–200 years, so that would be my choice.

Maybe we could kill only when necessary…

Photosynthesis. World hunger – gone!