Dr. Helen Fisher is an anthropologist, researcher, author, and expert on sex, love, and marriage. She shares the surprising science of why we mate, stay, and stray. Bonus, we talk online dating and love in the time of COVID.

Spending time in the company of good friends boosts your endorphins and floods your system with serotonin. NYT science writer Jacqueline Mroz walks us through the science, history, and cultural forces that shape friendship.