TEHRAN, December 30-The model found little evidence of flow, suggesting the ice deposits have remained still and stable over the last several million years.
TEHRAN, October 19 - Final preparations are underway for the launch of a joint-European and Japanese mission to Mercury, the closest planet to the Sun.
There have been concerns over the levels of mercury in fish for many years
Rising temperatures could boost mercury levels in fish by up to seven times the current rates, say Swedish researchers.
They've discovered a new way in which warming increases levels of the toxin in sea creatures.