01 JAN 2012 by ideonexus
Big History as a Fable Part II
Sex and death evolved – processes that vastly increased the rate of natural
selection. Some organisms evolved hard parts, climbed onto, and survived on the
land. The pace of production of more complex forms accelerated. Flight evolved.
Enormous four-legged beasts thundered across the steaming jungles. Small beasts
emerged, born live, instead of in hard-shelled containers filled with replicas of the
early oceans. They survived through swiftness and cunning – and increasingly long
periods i...Folksonomies: wonder big history
Folksonomies: wonder big history
Carl Sagan's account of the history of our Universe continued.
16 SEP 2011 by ideonexus
Big History: A Summary of Evolution of Life on Earth
The first organisms, simple photosynthetic bacteria, appear in sediments
about 3.5 billion years old, only about a billion years after the
planet was formed. These single cells were all that occupied the Earth
for the next two billion years, after which we see the first simple “eukaryotes”:
organisms having true cells with nuclei and chromosomes. Then,
around 600 million years ago, a whole gamut of relatively simple but
multicelled organisms arise, including worms, jellyfish, and sponges....Folksonomies: evolution big history
Folksonomies: evolution big history
A good summary of the origin of life on Earth evolving all the way up to human beings.