Only "pitiful" progress has been seen on pledges made at the 1992 Rio Earth Summit to protect ocean habitats and reduce fishing fleets, say scientists.

New tests on Spanish cave motifs show them to be thousands of years older than previously thought.

Canadian scientists use modelling dough replica caterpillars to test the effectiveness of their "eyespot" camouflage.

China has named the female astronaut who is set to become the nation's first woman in space when the Shenzhou 9 spacecraft launches on Saturday.

Scientists working on Voyager 1 are receiving further data suggesting the probe is close to crossing into interstellar space.

Disagreements, including a row over financial aid, and confusion have hampered preparatory talks at the UN conference in Rio de Janeiro.