Monkeys test 'hardworking gene'

From the BBC

"Scientists in the United States have found a way of turning lazy monkeys into workaholics using gene therapy.
Usually monkeys work hard only when they know a reward is coming, but the animals given this treatment did their best all the time.

Monkeys are rather like people in their approach to work - at least, those who live in a laboratory and learn to press levers for rewards of food and water."

I feel particular empathy with:

"learn to press levers for rewards of food and water."