Lampreys are tough, hungry, and invasive. Michigan and Canada have been fighting them for over half a century. Now, with the aide of pheromones, they may have found a new way to eradicate the lot of them.
Wasp researchers have come up with a cheap device that can be put together to measure how many times wasps sting. They found out that wasps sting a lot, especially if something already has wasp venom in it.
Pheromones are supposed to be the stuff that make animals do it like they do on the discovery channel. They are supposed make mothers love their babies and babies imprint on their mothers. But there are also kairomones — which just get animals killed.
Scientists have found that in worms and flies, the scent of pheromones from the opposite sex speeds up the aging process and shortens life — sometimes by as much as 40%! As Ed Yong points out in his latest column, there may be a trade-off between sex and longevity.
With all the exuberant resolutions and New Year's exercising, there's going to be a lot of sweat—or sweating it—this month. The anxiety got us wondering, why do we sweat? Is it different in smell and texture depending on the cause? Does it sometimes maybe even smell good?
According to researchers at the Weizmann Institute, chemicals in a woman's tears decreases a man's sexual arousal. Interestingly, there's no smell—tears couldn't be distinguished from saline. But the chemicals still lowered testosterone levels in test subjects. [Physorg.com]