A profile of Wolfowitz, the new director of the World Bank.

Scientists have implanted human brain cells into mice fetuses, creating a chimera -- a mixture of different species. Many similar experiments are being planned, but much more thought must go into looking at the consequences of such research. Other chimeras have already been created, one had the head of a goat and the body of a sheep.

O prefeito de Londres, Ken Livingstone, chamou Ariel Sharon de criminoso de guerra. Gostei de ver!

On plans to increase free online access to academic journals.

Mumbai is razing its slums, without first offering a viable housing alternative to its poor. More than half of its inhabitants live in slums.