"Outline of the Kangaroo about twelve hours after birth, showing its natural size and external development in this period." — Chambers, 1881

Infant Kangaroo

"Outline of the Kangaroo about twelve hours after birth, showing its natural size and external development…

A side view of the human skull at birth.

Infant skull

A side view of the human skull at birth.

A top down view of the human skull at birth.

Infant skull

A top down view of the human skull at birth.