Earth's History - the Evidence
This video summarizes the currently favored theories of the formation of the earth, atmosphere & development of life.

The Age of the Earth
U.S. Geological Survey
Modern Radiometric Dating

Establishing the Age of Events
ICS - GSSPs
Radiometric Dating

Dating the Appearances of Life
Dating using DNA
Dating using the fossil record

Formation of the Atmosphere
Earth's early atmosphere

Fossil Record of the Bacteria
Univ. Cal. Museum Paleontology

Eukaryotic Multicellular Life
Eukaryotes: Origin & Evolution

A "Download" of Earth's History

NOTE: Each 1-pixel movement of the tan progress bar -- every 1/2 second -- equals 11,250,000 years of Earth's History.

Given this scale, hominids appeared in the last 1/12 of a second, and modern humans appeared in the last 1/90 of a second. Mentioning them in this timeline is therefore an exaggeration.