From the Sumatran orangutan of Indonesia to the Cross River gorilla of Cameroon and Nigeria, nearly one third of all primates face imminent extinction. Learn more about the species we stand to lose with Windows Live Maps.

Chimpanzees under attack exaggerate their screams in order to get help from higher ranking group members, research has found. The study discovered that the primates produce high-pitched and prolonged screams when they are the victims of severe aggression such as beating or chasing.

Primate: an order of mammals that includes humans, apes (which are the closest living relatives to humans), monkeys, and some less familiar mammals, such as tarsiers, lorises, and lemurs. Humans and other primates share a common evolutionary descent.

Are we doing enough to safeguard endangered species? Is global warming the greatest threat to mankind - or is it just a lot of hot air? Join the green debates on our MSN Environment message boards.

Thousands of people have been killed in one county of China's Sichuan province alone after a major earthquake.

Scientists claim human-animal embryo research could help treat conditions like Parkinson's or multiple sclerosis, but opponents say it is unethical. Join the debate.

The death toll from the cyclone has now been tipped to top 200,000. Meanwhile aid agencies are struggling to help victims.