HumansThe world's largest stone circle started out as a humble ancient home Radar has uncovered evidence that the huge Avebury monument, near Stonehenge in Wiltshire, UK, once housed a simple dwelling right at its centre News
EnvironmentThis stunning map shows why everyone is fighting over the ArcticThe environmentally damaging melting of polar ice is also exposing minerals, archaeological wonders and even ice volcanoes and there's a race to get to themFeatures