Insomnia; depression; attention-deficit hyperactivity disorder; sexual infidelity. Most of us have dealt with at least one of these issues in our lives, and no wonder — so did our ancient ancestors.

This week on Skepticality, Swoopy welcomes back Dr. William Meller for a second round of discussion based on his book Evolution Rx. Evolutionary medicine sheds some light on how the adaptations of early humans affect our emotions, behaviors and our modern daily lives.