Scientists at Tokyo University say they have used genetic engineering to successfully switch off a mouse's instinct to cower at the smell or presence of cats - showing that fear is genetically hardwired and not learned through experience, as commonly believed, the AP reports.
"Mice are naturally terrified of cats and usually panic or flee at the smell of one," research team leader Ko Kobayakawa said. "But mice with certain nasal cells removed through genetic engineering didn't display any fear."
"The mice approached the cat, even snuggled up to it and played with it," Kobayakawa said. "The discovery that fear is genetically determined and not learned after birth is very interesting, and goes against what was previously thought."
The findings suggest that human aversion to dangerous smells like that of rotten food, for example, could also be genetically predetermined, he said.
Kobayakawa said his findings, published in the science magazine Nature last month, should help researchers shed further light on how the brain processes information about the outside world.
The discovery of the submarine has unveiled a few "inconsistencies." For example, how can one explain the fact that the sub was found where it needed to be searched for from the start?
The TurkStream, which runs along the bottom of the Black Sea from Russia's Anapa to Turkey, will consist of two lines, each with a capacity of 15.75 billion cubic meters of gas a year