We apologize for the confusion. They are actually saying similar things. The key is that, as the “10 Myths About the Cold” starts out saying, if you are not wearing any protective winter clothing to keep you warm, you will lose about 10 percent body heat through your head, somewhat proportional to surface area. However, if one is wearing protective clothing on all parts of the body except the head, the head is the most likely place where heat can escape. That’s where the “50 to 70 percent of body heat is lost through the top of your head, but only if the rest of your body is covered up” comes in, and why the “10 Myths” article indicates in general that if you are bundled up, you lose more of your body heat (than the usual 10 percent) through the top of an uncovered head.
We apologize for the confusion. They are actually saying similar things. The key is that, as the “10 Myths About the Cold” starts out saying, if you are not wearing any protective winter clothing to keep you warm, you will lose about 10 percent body heat through your head, somewhat proportional to surface area. However, if one is wearing protective clothing on all parts of the body except the head, the head is the most likely place where heat can escape. That’s where the “50 to 70 percent of body heat is lost through the top of your head, but only if the rest of your body is covered up” comes in, and why the “10 Myths” article indicates in general that if you are bundled up, you lose more of your body heat (than the usual 10 percent) through the top of an uncovered head.
Hope this helps!