Washington, Nov 18: An international team of scientists has uncovered evidence that supports the idea that oceans once covered about a third of ancient Mars.

The scientists found the evidence by analyzing data from the Gamma Ray Spectrometer onboard NASA’s Mars Odyssey.

“We compared Gamma Ray Spectrometer data on potassium, thorium and iron above and below a shoreline believed to mark an ancient ocean that covered a third of Mars’ surface, and an inner shoreline believed to mark a younger, smaller ocean,” said University of Arizona (UA) planetary geologist James M. Dohm, who led the international investigation.

London, Nov 18: Ever wondered why is it easier to re-learn riding a bicycle, even if we haven''t practiced for years? Well, now scientists at the Max Planck Institute of Neurobiology have provided an answer by showing what really goes on in the brain when it learns or forgets something.

They have shown that nerve cell contacts established during a learning process stay even when they are no longer required. The reactivation of this temporarily inactivated ''stock of contacts'' allows a faster learning of things forgotten.

Canadian researchers have said that women, with a family history of breast cancer, who test negative for two genetic mutations commonly linked to breast cancer, could still be at a high risk of developing the disease. The genes in question are BRCA1 and BRCA2, which are linked with particularly aggressive hereditary breast cancer and an increased risk of ovarian cancer as well.

Bigg Boss and controversies go side by side, and this time, the final contenders including Raja Chaudhary, Rahul Mahajan, Zulfi Sayed and Ashutosh Kaushik broke the most important house rule, of not leaving the Lonavala bungalow and tried to go out last night.

They all jumped the walls of the Bigg Boss house just because they were tired of home cooked food and wanted to taste food outside.

The source said, “They may have been forced to do so, as Zulfi the only guy who could cook refused to make food anymore.”

Washington, November 18: Barack Obama’s barber in Chicago has revealed that the U. S. President-elect does not seem to be too concerned about the greying of his hair.

"It''s just a normal thing," Us magazine quoted Zariff, who has been cutting Obama’s hair for 14 years, as saying.

"It''s not like he has a head full of gray hair. It''s just a few gray hairs, so it''s nothing to get excited about," the barber added.

Washington, Nov 18: Commenting on the recent troops-withdrawal pact between the Iraqi cabinet and the US, American top military officer Admiral Michael Mullen has said that the timing of that withdrawal should be based on “security conditions on the ground”.

Though, he added that the US military would require two to three years to remove its roughly 150,000 troops and “awful lot” of equipment from Iraq safely.

He said there were some logistical hurdles to a US troop withdrawal along a fixed timeframe.