jan 1, 540203181 BC - Paleozoic Era begins
Description:
Begins with the Cambrian explosion - this diversifies marine life. This is the era in which the greatest extinction event in Earth's history occurs - Thomas told us in class that this is when 3% of all life survived, and that small 3% is what all modern life stemmed from.
Added to timeline:
the eras!!!
yes
Date:
