An illustrated survey of 100 key events in Earth's dramatic history.

This reference work describes the trial-and-error experiments, discoveries, and inventions of early humans who lived from before recorded history to the Middle

Every once in a while, an idea comes along that makes the entire world sit up and take notice. From the earliest understandings of our place in the solar system

An essential compendium of some of the most world-changing discoveries and inventions of all time, from the first use of money to antibiotics and artificial int