AN ADULT HUMAN body consists of some 37trn cells. Not so long ago, these were thought to come in 220 different types. That number, the product of painstaking decades spent peering through microscopes ...
In the 1940s, Dr. William Sheldon organized human body types into endomorphs, mesomorphs and ectomorphs. The three groups differentiate bone structure, muscle and body fat and how each type carries ...
The human body may seem finely engineered, but many of its most familiar features reveal a history of evolutionary compromise ...
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