A species of sea slug that is able to repeatedly detach, re-grow and then re-use its penis surprises scientists.

A study has found that nocturnal artificial light in urban areas makes European blackbirds develop reproductive systems up to a month earlier than birds living in woodlands.

An African elephant mother's ability to feed and care for its calf has "long-lasting consequences" into adulthood, a study suggests.

Europe's Cryosat spacecraft observes a deep reduction in the volume of sea ice covering the Arctic Ocean in autumn months.

A design for Richard III's tomb is unveiled by an enthusiasts' group but church officials say a decision has not yet been made.

The remains of a small temple believed to be between 4,000 and 5,000 years old are discovered at an archaeological site near Peru's capital, Lima.

A roof section collapses at the defunct Chernobyl nuclear plant in Ukraine following heavy snow, but the authorities deny any increase in radiation.