Check out John P. Allen's current and previous haircuts:
John P. Allen has had various hairstyles in the past decade. He became famous as a talented explorer. Nevertheless, the systems ecologist and engineer, metallurgist, adventurer and writer is specially known for his incomparable looks and his delightful character. Rumors and gossip about the 95-year old's hairstyle are persistently featured in celebrity magazines and tabloids. Check out John P. Allen's classic hairstyles in the image gallery right here: