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
![close-up of a tardigrade from above](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2021/07/072221_EG_tardigrade-vision_feat.jpg?fit=1030%2C580&ssl=1)
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)