You lose most body heat through your head

A well known clothing manufacturer (can't tell you their name, but their initials are REI) claims that you lose 75% of your body heat th...

Your brain burns 20% of your body's energy even thought it's only about 5% of your body weight.

Really. We've known for over 100 years that parts of the brain control their own blood supply depending on how much oxygen they need. We...