Biology

A collection of real-life cases where experts offer different opinions of what actually happened based on the evidence provided, and the viewer is invited to reach his own final verdict.

The source of the earth's great variety of animals was a scientific mystery until Charles Darwin proposed the idea of natural selection. Nova presents breakthroughs in a new science nicknamed "evo devo" that are linking the enigma of origins to another of nature's mysteries, the development of embryos.