In fast ancient, our ancestor is chasing for a long time in the life, invented spicula, the hide that uses a softness is seamed bunch go up in the leg, climb step snow, chase a beast.

• 在远古时代，我们的祖先在长期狩猎生活中，发明了骨针，并用来把柔软的兽皮缝捆在腿上，爬山踏雪，追捕野兽。