Washington, April 27 : Adult circumcision lowers the risk of contracting the human immunodeficiency virus (HIV) and the risk of coital injury without reducing pleasure or causing sexual dysfunction, two new studies have shown.

The first study, conducted by Australian researchers, has shown that the inner foreskin has the largest concentration of Langerhans'' cells, which are the initial cellular targets in the sexual transmission of HIV.

Washington, Apr. 27 : While concerns were raised across the world about the Taliban gaining ground in Pakistan and arriving on the door steps of Islamabad, the sudden reaction by the United States and the open warning about Pakistan's democratic set-up caving-in to the hands of the extremists has only added to the panic in the region, says an article in the Washington Post.

Washington, April 27 : Scientists have discovered a dinosaur tooth along what's now the Kakanaut River of northeastern Russia, a find that shows dinos once lived above the Arctic Circle.

Scientists say the dinosaurs became extinct 65 million years ago when a big meteor crash set off volcanoes galore, with dust and smoke filling up the air.

One theory holds that cold, brought on by the Sun's concealment, is what did them in, but a team of paleontologists led by Pascal Godefroit, of the Royal Belgian Institute of Natural Sciences in Brussels, argues otherwise.

Washington, Apr 27 : New York scientists have found that cutaneous application of nanoparticles, could offer a new means of delivering drugs to treat erectile dysfunction (ED).

The findings have revealed that topical treatments for ED could provide localized therapeutic results with the benefit of lower dosage and the avoidance of adverse side effects due to systemic absorption.

For the study, the researchers investigated a novel hybrid hydrogel/glass nanoparticle platform.

Washington, April 27 : A new study has shown that obesity is associated with a higher risk of urinary tract infections (UTI).

To identify whether obesity is associated with a UTI diagnosis, Baltimore researchers evaluated insurance claims of 95,962 subjects over a five-year period (from 2002 through 2006).

They found that, as BMI increased, the odds of being diagnosed with a UTI increased as well.

This association was strongest for morbidly obese patients.

Washington, April 27 : Science is trying its level best to improve people's sex lives - and the latest offering from scientists is a new topical spray, which has turned out to be a safe and effective treatment for premature ejaculation.

Current treatment for premature ejaculation consists of topical creams with desensitizing agents which dull the penile skin and delay ejaculation.