A South American dolphin is the first "true mammal" to sense prey by their electrical fields, scientists report.

A study of human skulls shows humans living at high latitude evolved bigger eyes and brains to see in poor light.

A mountain lion killed on a road in the US state of Connecticut walked halfway across the US from South Dakota before its death, scientists say.

An art dealer is arrested and accused of smuggling a tonne of African ivory into the US for sale at his Philadelphia store.

A herd of Critically Endangered wild horses in the Chernobyl exclusion zone is under threat from poachers, say scientists.

Scientists in Glasgow develop a new test of the ageing process, which confirms it is linked to social factors.

An independent review of the use of monkeys in UK medical research finds the work is generally of good quality, but one in 10 projects showed no benefits.

The 2012 Olympics will be the first summer games to use "biological passports" to try to stop drug cheats