Since facial expressions like smiling evolved with the ... “There are some things the skull can’t tell you,” admits Adrie Kennis. “You never know how much fat someone had around their ...

Three construction teams, each with their own blueprint One type of precursor cell forms the skull and facial bones, another the spinal column and ribs, and a third type the skeleton of the limbs.

As a social tool, facial expression is incredibly useful ... to the development of mobile eyebrows in tandem with a taller skull. Over hundreds of thousands of years, this change could have ...