Precambrian era life

Illustration spanning from the PreCambrian to the present, approximately 4600 million years, splitting into six unequal columns. This demonstrates the incredible span of geological time horseshoe crabs have been in existence, 480 million years, since the Ordovician.

paleozoic era - Yahoo Image Search Results

Much has been written about dinosaurs and the fury of T-Rex in popular culture; but are you aware there were giant creatures dominating Earth's oceans long, long before the dino-era ending 65 million years ago?

An interdisciplinary study suggests the strange creatures that lived in the Garden of the Ediacaran more than 540 million years ago may have been much more dynamic than experts have thought.

The sky was dark and cloudy because of sulphurous clouds and dust from numerous meteoroid impacts and powerful storms. Atmospheric pressure was about 250 atm

The Precambrian Era began about 4570 million years ago. The time period began due to the Earth's formation. The Archean period was the first period too occur during this era. Earth, during...

"Eon," also spelled as "aeon," refers to the largest division of the geologic time scale, superseding eras. It signifies an indefinitely long period, often used to describe billion-year timescales in the field of geology and cosmology.

Geologic Time (not shown to scale with respect to time length.) Precambrian accounts for 88% of Geologic time! If time for all life on earth was compressed into 24 hours, humans appear on the scene only 1 second before midnight. (The last second in last hour.)

Pre Cambrian ocean