The human body is a machine whose many parts – from the microscopic details of our cells to our limbs, eyes, liver and brain – have been assembled in fits and starts over the four billion years of our ...

Cat Bohannon's "Eve" is vaguely intimidating. Fine, more than a little intimidating. It's more than 600 pages, promising to cover 200 million years of human evolution. The young adult adaptation, just ...

What are humans adapted for? -- Upstanding apes: how we became bipeds -- Much depends on dinner: how australopiths partly weaned us off fruit -- The first hunter-gatherers: how nearly modern bodies ...