Thousands of years in the making, the Olympics began as part of a religious festival honoring the Greek god Zeus in the rural Greek town of Olympia. But how did it become the greatest show of sporting excellence on earth? Educator Armand D'Angour explains the evolution of the Olympics. (Directed by Diogo Viegas, narrated by Addison Anderson, music by Cem Misirlioglu and Brooks Ball)

"What if I was to tell you that a game of peek-a-boo could change the world?" asks seven-year-old Molly Wright, one of the youngest-ever TED speakers. Breaking down the research-backed ways parents and caregivers can support children's healthy brain development, Wright highlights the benefits of play on lifelong learning, behavior and well-being, sharing effective strategies to help all kids thrive by the age of five. She's joined onstage by one-year-old Ari and his dad, Amarjot, who help illustrate her big ideas about brain science. (This TED Talk was produced in collaboration with Minderoo Foundation as an educational tool for parents and caregivers around the world and is supported by UNICEF.)

Beauty is about more than the body you inhabit -- it's a way of being that goes beyond genetics or societal ideals. Aboriginal writer and former model Sasha Sarago invites you to decolonize beauty, moving away from the monolithic Eurocentric archetype and towards a more essential, authentic understanding of self that belongs to everyone.

Something powerful is happening around the world. The issue of climate change has moved from the margins to the mainstream, says Alok Sharma, the President-Designate of COP26, the United Nations climate conference set to take place in November 2021 in Glasgow, Scotland. He unpacks what this shift means for the world economy and the accelerating "green industrial revolution" -- and lays out the urgent actions that need to happen in order to limit global temperature rise.

Racism morphs, spreading and hiding behind numerous half-truths and full-blown falsities about where it lives and who embodies it. In this actionable talk, political scientist Candis Watts Smith debunks three widely accepted myths about racism in the US and calls for a nuanced, more expansive definition to support this new era of anti-racist action.

A brief answer to one of the key questions about climate change: Why act now? (Written by Myles Allen, David Biello and George Zaidan)

A brief answer to one of the key questions about climate change: Why is 1.5 degrees such a big deal? (Written by Myles Allen, David Biello and George Zaidan)

A brief answer to one of the key questions about climate change: Where does all the carbon we release go? (Written by Myles Allen, David Biello and George Zaidan)

A brief answer to one of the key questions about climate change: What is net-zero? (Written by Myles Allen, David Biello and George Zaidan)

A brief answer to one of the key questions about climate change: Why is the world warming up? (Written by Myles Allen, David Biello and George Zaidan)