Tom and Jerry just wouldn't have been the same if it had featured one of Ko Kobayakawa's mice.
The Tokyo University professor has just unveiled mutant mice that have lost their innate fear of cats.
Rather
than flee or freeze when confronted with their feline enemy, the mice
sniffed and even played with them, blissfully unaware of the potential
dangers.
Kobayakawa developed the fearless mice by shutting down
receptors in their olfactory bulb - the area of the brain that
processes information about smells - which would normally induce panic
as soon as they get so much as a whiff of a cat.
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