New research suggests roundworms can perceive color without eyes, raising questions about the evolution of color discrimination in animals.

"We wanted to understand which component of the blue pigment toxin pyocyanin – its color or its toxicity – was informing the worms’ avoidance," says Ghosh, now at MIT, to Inverse ’s Tara ...

This pathogen secretes pyocyanin, a toxic compound that damages surrounding tissue and helps the infection spread. Early detection of pyocyanin could allow faster intervention, but current sensors ...