Head

A baby's head is around a quarter of his entire length, whereas an adult's is only one-eighth.

An adult human head weighs between 8 and 12 pounds.

The human head has 22 bones.

Then 5-year-old actor Jonathan Lipnicki, who played Ray Boyd in Jerry Maguire (1997), showed up on set one day telling everyone that the "human head weighs 8 pounds." The director Cameron Crowe liked it so much he wrote it into the script.

A human head remains conscious for about 15 to 20 seconds after it is decapitated.

Phrenology is a pseudoscience which involves the measurement of bumps on the skull to predict mental traits. Phrenology is responsible for many sayings. Intelligent people had a "highbrow", stupid people had a "lowbrow", people with balanced attributes' heads were "well-rounded" and psychiatrists would reduce areas of people's brains and were called "shrinks".

The farthest head rotation by a mammal is 180 degrees, achieved by the Philippine tarsier, a small primate found in the forests of south-east Asian islands. The tarsier’s eyes are fixed in its skull, meaning it can be turned in their sockets. So if it wants to see what’s beside and behind it, it has to turn its entire head. The large-eyed primate can do this in each direction.

By mtoz