Ecologist Carl Safina says humans aren't the only ones who love, grieve, or think. He argues if animals are more complex then we once thought, shouldn't we reconsider the ethics of how we treat them?

We know that dolphins make distinctive clicks and whistles. But is that a language? Researcher Denise Herzing thinks it might be — and for the past 35 years — she's been working on unlocking it.

In 2018, an orca made headlines when she carried her dead calf on her back for weeks. Barbara King says this was a display of animal grief and explains how this changes our relationship with animals.

What makes an "alpha male?" Primatologist Frans de Waal says we often get it wrong. His research shows that alpha males possess leadership traits like generosity, peacekeeping, and empathy.

How do you build confidence, when the world has taught you not to be confident? Activist Brittany Packnett talks about confidence in her own personal journey as a woman of color.

You've heard it before - don't talk sex, politics, or religion with "mixed company." But Priya Parker disagrees. She says gatherings would be more meaningful if we let them get a bit uncomfortable.

Stress is an unpleasant emotion — but does it have an upside? Health psychologist Kelly McGonigal says adjusting the way you think about stress can actually change the way your body responds to it.

During a normal workday, most of us sit for hours on end ... and it's hurting our health. Nilofer Merchant has a simple solution: next time you have an important meeting, take a walk.