One of the largest land mammoth that ever lived was the woolly mammoth.Woolly mammoth were very large,elephant -like creatures covered in long,thick,warm hair.They needed their warm coast because they lived during the last ice age.They became extinct thousands of years ago.In places such as Siberia,in Russia,thousands of woolly mammoth became mummies after they died.Today,some of these frozen mummies can be found in very good condition.One person who has spent many years studying woolly mammoth is the French explorer Bernard Buigues.To find the mammoths,Buigues relies on tribes that live in the frozen areas where the creatures once lived.One of these tribes,the Dolgans,live on Siberia's frozen Taimyr Peninsula.TheDolgans knew of many places where frozen woolly mammoths could be found and often used mammoth tusks for tools.