Near-invincible tardigrades may see only in black and white
A genetic analysis hints that the critters lack the right light-sensing proteins to see color
The world of color might be out of reach for tardigrades like Hypsibius exemplaris (shown) because the critters don't have the right light-sensing proteins, a study suggests.
Goldstein lab - tardigrades/Flickr (CC BY-NC-SA 2.0)