In the 150 years since Charles Darwin recognised the kinship of all life, scientists have worked to fulfil his dream of a complete Tree of Life . Today, the methods used to trace the evolutionary branches back through time would exceed Darwin’s expectations. Scientists across a range of biological disciplines use a technique called the molecular clock , where the past is deciphered by reading the stories written in the genes of living organisms. Read more…

More:
What Is the Molecular Clock, Exactly?