Saiga antelopes are survivors of ice ages that have shared the world with woolly mammoths and saber-toothed tigers. Their strange noses have evolved to warm the cold winter air, but also to expel the dust raised from the plains in summer. They can anticipate the weather, develop their coats for shelter, and migrate south just before the snow hits. In the early 1990s, there were more than a million saiga antelopes in the Eurasian steppe, but only 2% of that population is preserved today. Saigas are poached for their horns, which are sold in East Asia as pain relievers and antidepressants, so in a short time there may not be enough males left to lift this species out of danger.