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 ...

Scientists uncover how finger-length ratios in newborns reveal hormonal influences that may have shaped human brain evolution.

Human evolution has long been tied to growing brain size, and new research suggests prenatal hormones may have played a surprising role. By studying the relative lengths of index and ring fingers — a ...

Humans' exposure to high temperature burn injuries may have played an important role in our evolutionary development, shaping ...

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If we look across the whole of the mammal branch of the tree of life, we find there are many groups of mammals that have ...

This measure compares the length of the index finger to the ring finger, a relationship called the 2D:4D ratio. Scientists have shown that this ratio reflects the balance of estrogen and testosterone ...