TED Talks Daily

In the United States, it's estimated that 30 percent of adults and 66 percent of adolescents are regularly sleep-deprived. This isn't just a minor inconvenience: staying awake can cause serious bodily harm. Claudia Aguirre shows what happens to your body and brain when you skip sleep.

A 24-hour helpline in the UK known as Samaritans helped Sophie Andrews become a survivor of abuse rather than a victim. Now she's paying the favor back as the founder of The Silver Line, a helpline that supports lonely and isolated older people. In a powerful, personal talk, she shares why the simple act of listening (instead of giving advice) is often the best way to help someone in need.

As CEO of the Global Fund for Women, Musimbi Kanyoro works to support women and their ideas so they can expand and grow. She introduces us to the Maragoli concept of "isirika" -- a pragmatic way of life that embraces the mutual responsibility to care for one another -- something she sees women practicing all over the world. And she calls for those who have more to give more to people working to improve their communities. "Imagine what it would look like if you embraced isirika and made it your default," Kanyoro says. "What could we achieve for each other? For humanity?" Let's find out -- together.

"Hold your breath," says inventor Tom Zimmerman. "This is the world without plankton." These tiny organisms produce two-thirds of our planet's oxygen -- without them, life as we know it wouldn't exist. In this talk and tech demo, Zimmerman and cell engineer Simone Bianco hook up a 3D microscope to a drop of water and take you scuba diving with plankton. Learn more about these mesmerizing creatures and get inspired to protect them against ongoing threats from climate change.

No one thinks twice about a woman wearing blue jeans in New York City -- but when Nobel laureate Malala wears them, it's a political act. Around the globe, individuality can be a crime, and clothing can be a form of protest. In a talk about the power of what we wear, Kaustav Dey examines how fashion gives us a nonverbal language of dissent and encourages us to embrace our authentic selves.

"Soccer is the only thing on this planet that we can all agree to do together," says theater maker and TED Fellow Marc Bamuthi Joseph. Through his performances and an engagement initiative called "Moving and Passing," Joseph combines music, dance and soccer to reveal accessible, joyful connections between the arts and sports. Learn more about how he's using the beautiful game to foster community and highlight issues facing immigrants.

A 2.4-mile swim, a 112-mile bicycle ride and then a full-length marathon on hot, dry ground -- with no breaks in between: the legendary Ironman triathlon in Kona, Hawaii, is a bucket list goal for champion athletes. But when Minda Dentler decided to take it on, she had bigger aspirations than just another medal around her neck. She tells the story of how she conquered this epic race, and what it inspired her to do next.

Want to connect with a depressed friend but not sure how to relate to them? Comedian and storyteller Bill Bernat has a few suggestions. Learn some dos and don'ts for talking to people living with depression -- and handle your next conversation with grace and maybe a bit of humor.

Poets Felice Belle and Jennifer Murphy perform excerpts from their play "Other Women," which is created and directed by Monica L. Williams. In a captivating journey, they weave together stories full of laughter, loyalty, tragedy and heartbreak, recalling the moments that made them sisters.

Shameem Akhtar posed as a boy during her early childhood in Pakistan so she could enjoy the privileges Pakistani girls are rarely afforded: to play outside and attend school. In an eye-opening, personal talk, Akhtar recounts how the opportunity to get an education altered the course of her life -- and ultimately changed the culture of her village, where today every young girl goes to school.