Evolutionary Timeline The Big Bang happened 14 billion years ago. Life arose nearly 4 billion years back . “Our brains have never before needed to be able to comprehend such vastness of time. A decade is probably the longest duration of time that our brains can correctly imagine.” Now try a million, or a billion years. It is not surprising then, that some people reject this incomprehensible vastness for “a shorter, emotionally more pleasing yet incorrect number of about 6,000 years for the age of the Universe.” Check out this very cool evolutionary timeline, drawn to scale. Drag the time slider through eight telescoping sections. There’s a lot happening.
Thanks to +Suhail Manzoor , for finding the blog that led me to this: (http://blogs.scientificamerican.com/a-blog-around-the-clock/2011/10/22/bio101-evolution-of-biological-diversity/)