Washington, March 17 : Chemists have used single oxygen atoms dancing on a metal oxide slab, to get a better understanding of how water splits into oxygen and hydrogen, which would improve their understanding of the chemistry needed to generate hydrogen fuel from water or to clean contaminated water.

The scientists, from the Department of Energy''s Pacific Northwest National Laboratory (PNNL), made the discovery while trying to determine the basics of how titanium dioxide - a compound sometimes found in sunscreen - breaks down water.

The chemical reactions between water and oxygen are central to such varied processes as hydrogen production, breaking down pollutants, and in solar energy.

Washington, March 17 : Scientists in America have identified the triggering mechanism by which breast and prostate cancer cells begin.

Dr. Ercole Cavalieri and Dr. Eleanor Rogen made this achievement with their colleagues at the University of Nebraska Medical Center, Eppley Institute for Research in Cancer in Omaha, Nebraska.

"We have found the first step that starts a cell down the road to becoming a cancer cell. By blocking this first step from happening, we feel we can stop the development of breast and prostate cancer," say the researchers.

Washington, Mar 17 : Jennifer Lopez's husband Marc Anthony is insisting her to become a mum again.

The singer - who welcomed twins Max and Emme in February last year - says her husband is keen to add to the brood.

However, Lopez says that wants to focus on her career for a while first, reports Contactmusic.

Washington, Mar 17 : A gene that causes obesity could also lead to polycystic ovary syndrome (PCOS) in women, a new study has suggested.

The FTO gene has recently been shown to influence a person''s predisposition to obesity, and is now the first gene to be associated convincingly with susceptibility to PCOS.

Washington, Mar 17 : R&B star Rihanna has dismissed reports she is in negotiations to star in a remake of Whitney Houston''s 1992 classic `The Bodyguard'.

Reports claimed that the `Umbrella' hitmaker would be playing Houston's role in the updated version of the hit romantic drama, reports Contactmusic.

Rihanna has been keeping a low profile since an alleged bust-up with her boyfriend Chris Brown last month but sources said that she is planning to return to the public eye with a move to Hollywood.

Washington, Mar 17 : A steroid nasal spray has been found to reduce symptoms of chronic rhinosinusitis, according to a new study led by Indian origin scientist.

Researchers led by Neil S. Sachanandani from Washington University School of Medicine have found that an aqueous nasal spray containing corticosteroid budesonide has been shown to be safe and beneficial for those with chronic rhinosinusitis and recurring allergies.