Joy of sex education

George Monbiot: America's virgin soldiers are on their way - ignoring the dangers of abstinence for teenagers.

Want to be slim? Cut your blood supply

Scientists have found a new way to make the obese slim again - by cutting off the blood supply to the layers of fat that are a health hazard for hundreds of millions of people.

Stop this sexual shielding

Kierra Box: Teenagers are not going to stop having sex, so give them access to advice and contraception.

Sleepless in academia

Student health, potty professors and weblogs. David Cohen trawls the web for the latest offbeat news in the world of international higher learning

The tissue issue

The human tissue bill has provoked anger but what specific science would be derailed? Kirsty Scott investigates