Artist, scientist, engineer and philosopher — titles that only scratch the surface of what 15th century Italian Leonardo da Vinci achieved. A new two-part PBS documentary series from Ken Burns, Sarah Burns and David McMahon dissects da Vinci’s life in an effort to make sense of his work and the impact he has to this day.

Sniffing out relatives? It may not be the human way, but it works for one finely dressed bird. We explore penguin behavior and more in tonight's Scientific Chicago.