Does not getting enough sleep lead to Alzheimer's disease? Sleep scientist Matt Walker explains the relationship between the two -- and how researchers are exploring how to use sleep to decrease our chances of developing this condition.

Why do people distrust vaccines? Anthropologist Heidi Larson explores how medical rumors originate, spread and fuel resistance to vaccines worldwide. While vaccines cannot escape the "political and social turbulence" that surrounds them, she says, the first step to stopping the spread of disease is to talk to people, listen and build trust.

Refugees fleeing persecution endure unimaginable hardships in search of a better life. Physician Joseph Shin explains the essential collaboration of doctors and lawyers working together to help asylum seekers in the United States, sharing promising pathways toward securing the human dignities they deserve.

What does it look like inside the mind of a machine? Inspired by the architectural vision of a futuristic Los Angeles in "Blade Runner," media artist Refik Anadol melds art with artificial intelligence in his studio's collaborations with architects, data scientists, neuroscientists, musicians and more. Witness otherworldly installations that might make you rethink the future of tech and creativity.

One of the best things that you can do to boost your immune system is head to bed, says sleep scientist Matt Walker. It can even make your flu shot more effective!

The path to better food is paved with data, says entrepreneur Erin Baumgartner. Drawing from her experience running a farm-to-table business, she outlines her plan to help create a healthier, zero-waste food system that values the quality and taste of small, local farm harvests over factory-farmed produce.

You know you need to get enough sleep, but the question remains: How much is enough? Sleep scientist Matt Walker tells us the recommended amount for adults and explains why it's necessary for your long-term health.

For intersex people -- those born with sex characteristics outside the traditional definitions of female and male -- the stakes to appear "normal" are high. Drawing on her personal experience, Susannah Temko reveals the shame, prejudice and harm faced by the intersex community, as they're forced to conform to a binary understanding of sex that ultimately hinders their health and well-being. She calls on us all to discard outdated notions of biological sex and accept the complexity within humanity.

If we want to build back better after the pandemic, we must reconsider philanthropy and create a new kind of capitalism that's rooted in generosity and accountability, says Darren Walker, president of the Ford Foundation. In this vital conversation, Walker calls for citizens and corporations to question the inequality that makes their wealth possible, to think about their own complicity in creating economic injustice and to celebrate the critical role art plays in creating a culture that uplifts everyone. (This virtual conversation, hosted by head of TED Chris Anderson, was recorded July 1, 2020.)

The pandemic has deepened the need to rethink education. In conversation with TED Global Curator Bruno Giussani, Dr. Ahmad M. Hasnah of Qatar Foundation discusses an educational model from Doha, Qatar that informs the global needs of students and shares insight into the newly launched TEDinArabic (بالعربي TED), a global platform for thinkers, researchers, artists and change-makers across the Arabic-speaking world.