Technology needed to cut pollution

WASHINGTON (Reuters) - The world's top polluting nations agreed new energy-generating technologies are needed to curb global warming and developing countries asked rich states for training and know-how, a World Bank official said on Wednesday.WASHINGTON (Reuters) - A land bridge between Alaska and Siberia flooded to make the Bering Strait 11,000 years ago, more than 1,000 years earlier than previously thought, U.S. researchers reported on Wednesday.LONDON (Reuters) - Wobbles or variations in the Earth's orbit and tilt are associated with extinctions of rodent and mammalian species, Dutch scientists said on Wednesday.