The bark of certain yew trees can yield a medicine that fights cancer.Now scientists find the dirt that yew trees grow in can supply the drug as well, suggesting a new way to commercially harvest the medicine.Scientists originally isolated the drug paclitaxel-now commonly known as Taxol-in 1967 from the bark of Pacific yew trees (Texus brevifolia) in a forest near the Mount St.Helens in Washington.This yew also yields related compounds known as taxanes that can be converted to paclitaxel.Research since then has revealed other yew species generate paclitaxel and taxanes as well,as do some fungi and certain hazelnut varieties.
A man usually needs about two or three minutes of stimulation to have an orgasm,a woman generally needs 10 times more. For a man,an orgasm is instinctive.For a woman,it happens only after direct stimulation of the clitoris. A man's climax usually lasts for 10-13 seconds.For a woman,it lasts 6-60 seconds. A man must recuperate after an orgasm but a woman can have repeated orgasms within minutes or in rapid succession. Wonder why a man rolls over and sleeps after? During sex,his body releases oxytocin,a hormone that induces drowsiness.A woman is more relaxed after sex,which is why she wants to talk or cuddle.
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