What is remarkable about one in particular in the Moscow Museum of Palaeontology is that it has a bullet hole in its skull. The hole is round, without radial cracks that would result from slower projectiles like spears and arrows. The only known projectile that leaves this kind of smooth, round hole without radial cracks is a bullet because of its velocity.
Prehistoric Bullet Holes
Really think this was made by a bullet. This animal went extinct 8000 years ago.