Bare necessities of grizzlies' diet revealed

Researchers from Canada and the US have revealed new insights into the eating habits and hair-growth patterns of a wild grizzly bear population, by analysing the chemical content of their fur. By examining the ratios of different isotopes of carbon, nitrogen and sulfur in the samples, the researchers could determine what proportion of vegetation, fish, or land mammals like moose and mountain goats made-up the bears’ diet.