Japan raises the severity measure of its nuclear crisis to the highest level, but says radiation leakage is a tenth of that from the 1986 Chernobyl disaster.

A number of penguin species found in western Antarctica are declining as a result of a fall in the availability of krill, a study suggests.

Space exploration remains a priority for Russia, President Dmitry Medvedev has said, as Russia marks the 50th anniversary of the first human space flight by cosmonaut Yuri Gagarin.

In a unique role reversal, male wolf spiders cannibalise older females due to harsh habitats, scientists find.

A boulder with three different fossilised dinosaur footprints is discovered at Brook Bay.

The IAAF approves new regulations to clarify hyperandrogenism issues following the row over South African runner Caster Semenya.

An ambitious project gets under way to create a network of "Bee Roads" to act as food-rich routes for pollinators.

The new kid on the energy block, shale gas, may be worse for climate change than coal, a study concludes.