The Mayo Clinic has released images of cats with a green glow about them, who may hold an important clue in the fight against AIDS in felines and people
Researchers are modifying genes in cats and say they're quite impressed with the results. They say they inserted genes from a monkey into cats' eggs before fertilization.
The genes are known to block FIV infections, which are similar to HIV in humans.
The team also placed a jellyfish gene in the cats for tracking purposes. That's what makes the resulting kittens glow green.
Researchers say early tests show these kittens' modified cells kept FIV infections from spreading.