[null and void]

I wouldn't swear that IR can't drive reactions. Yes it's not very likely, and life here hasn't figured it out, but I wouldn't completely rule it out. Dual photon absorption, maybe?

Besides life can run quite well on chemosynthesis even on earth.

[El Gato]

I wouldn't swear that IR can't drive reactions. Yes it's not very likely, and life here hasn't figured it out, but I wouldn't completely rule it out. Dual photon absorption, maybe?

There is an article discussing just this topic, photosynthesis on planets of stars with different spectral output linked right next to this article.

For plants on alien worlds, it isn't easy being green

[BobS]

O.K. So what kind of people would be there? We have black and white people running all around right here for a reason. One color reflects infrared and the other one reflects ultraviolet. It also means one color absorbs infrared and the other absorbs ultraviolet. I am approaching this logically because I forgot this.

Red has a longer wavelength than ultraviolet. Which also means red has a lower frequency than ultraviolet. We know there is a lot of ultraviolet on our equator and people have dark skin there. And not much ultraviolet farther north where infrared is needed.

Could we have a planet there of white aliens? Hiring illegal aliens from other planets to do what they are too lazy to do? Just an exercise between skin color and wavelength. Am I wrong?