4.5 billion years sounds a lot to me, but Earth is relatively a newer planet. For last 4 billion years there exists some form of life here, majorly green-blue algae, but what I failed to understand is that how diverse life (multi-cell) only evolved some 545 million year ago. Scientist call this event as Cambrian [...]
Recently my wife was reading Kathy Reichs novel where she has described about mitochondrial DNA (mtDNA). Kathy Reichs is also producer & writer of the popular TV series Bones. Before hearing about mtDNA, I had very little idea about any types of DNAs, except Y & X chromosomes. My DNA knowledge is/was limited to doing paternity [...]
 | |
 |  |