Tetrapods are older than we previously thought

A new article in nature magazine shows that tetrapods might have existed more than 20 million years than previously thought. The evidence points to tetrapod footprints dating around 395 million years. It sheds some interesting facts about evolution of tetrapods from fish.

First this transition might have happened at at different times. this clearly shows that if given conditions are right, evolution from one state to another can happen easily.

Secondly this transition can occur in different places if the intial conditions are right, it clearly shows that creatures are just like machines. The basics are quite simple.

links to the original paper and some videos:

http://www.nature.com/nature/journal/v463/n7277/full/nature08623.html
http://www.nature.com/nature/videoarchive/tetrapods/index.html

The link between fish and Humans

Source: http://en.wikipedia.org/wiki/Timeline_of_human_evolution


The Sarcopterygii (http://en.wikipedia.org/wiki/Sarcopterygii) is a class of fish which grew limbs and evolved into amphibians

The Tiktaalik (http://en.wikipedia.org/wiki/Tiktaalik) is an intermediate form between Fish and amphibians

Descendants of the Amphibians later evolved into Aminotes (http://en.wikipedia.org/wiki/Amniote) which split up into Synapids(mammals) and Sauropsids(reptiles and birds)