"Doctor, is this really necessary?" Backed by startling statistics about overtreatment, neurosurgeon Christer Mjåset explains the power of this and other simple questions in the context of medical treatment and surgery -- and shares how patients can better work with doctors to get the care they need.

4 questions you should always ask your doctor | Christer Mjåset

TED is a nonprofit devoted to ideas worth spreading. On this video feed, you'll find TED Talks to inspire, intrigue and stir the imagination from some of the world's leading thinkers and doers, speaking from the stage at TED conferences, TEDx events and partner events around the world. This podcast is also available in high-def video and audio-only formats.

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It might sound like the plot of a movie, but economic crime is all around us — from drug trafficking and fraud to cybercrimes, tax evasion and more. Economic crime fighter Hanjo Seibert breaks down the complexities of money laundering and how we can all wield our collective power to dismantle the underworld economy and turn off the money tap for criminals.

What you can do to stop economic crime | Hanjo Seibert

When filmmaker Desiree Akhavan told her Iranian immigrant parents she was in love with a woman, she knew they would object. She explains why it's worth the risk to let people get to know the real you.

Why you should disappoint your parents | Desiree Akhavan

Can cannabis actually treat insomnia? It's complicated, says sleep physiologist Jen Walsh. While the plant has been used across time and cultures, there's been little scientific research on how it impacts sleep disorders like insomnia. That's precisely where she and her team come in. Learn about the world's first study into the potential of medicinal cannabis as a safe, accessible treatment to help us all rest easy.

Can cannabis help you sleep? Here's the science | Jen Walsh

In a part of the United States with more than 17,000 years of human history, cultural preservation advocate Tracie Revis is working to turn the Ocmulgee Mounds into Georgia's first national park and preserve. This park would be co-managed by the Muscogee (Creek) Nation, bringing the tribal voice back to an area they were forcibly removed from 200 years ago. Revis explores the complex feelings of caring for this land and shows how it's fostering healing in return.

A new national park to reclaim Indigenous land | Tracie Revis

TED is on a mission to discover and champion the ideas that will shape tomorrow. Reflecting on the evolution of that mission, TED's Chris Anderson and Monique Ruff-Bell cast a visionary gaze on the organization's future — including a revamped tagline, a renewed emphasis on debate and the launch of an exciting new conference — and explore the indispensable role of ideas in navigating societal challenges and fostering global innovation. Learn more about TED's enduring legacy, its path forward for the decades ahead and how you can join us in sparking a brighter future.

Ideas change everything — and what's next for TED | Chris Anderson and Monique Ruff-Bell

TED Talks Daily (SD video)

4 questions you should always ask your doctor | Christer Mjåset

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