Humans and chimpanzees famously share more than 98% of their genome and yet the two species look and behave quite differently.  This apparent paradox stretches well beyond our little corner of the tree of life; we share more than half our genes with chickens and those we share are 75% identical.  Two studies published together in the December issue of Science tackled this perplexing discrepancy by showing that there may be more to a genome than meets the eye. Continue reading →