Ancient hunting tools found

Melting ice in Canada's far north has revealed a treasure trove of ancient tools used to hunt caribou and other prey.

High in the Yukon's Mackenzie Mountains, Canadian archaeologists have discovered 2400-year-old spear-throwing tools, a 1000-year-old ground squirrel snare, and bows and arrows dating back 850 years.

"The implements are truly amazing," said Tom Andrews, an archaeologist with the Prince of Wales Northern Heritage Centre in Yellowknife and lead researcher on the International Polar Year Ice Patch Study.

The tools were discovered in patches of ice where caribou have gathered for millennia to escape heat and insects.