TED Talks Daily (SD video)

When you fall asleep and start dreaming, you're actually doing very important work. According to sleep scientist Matt Walker, dreams act like a form of "overnight therapy." In fact, your dreams may even boost your ability to solve problems and process tough emotions that affect your waking life.

Floods, droughts, heat waves and cold blasts -- why is the weather becoming more extreme? Environmentalist and "America's weatherman" Al Roker discusses the link between climate change and disruptions to weather patterns worldwide, followed by a conversation between Nobel laureate Al Gore and TED science curator David Biello about the science of extreme weather and emerging solutions to reduce the risk of these events. (This segment, introduced by radio researcher Latif Nasser, was part of TED's Countdown Global Livestream on October 30, 2021.)

Investing in green energy, holding large corporations accountable for their pollution, stopping pipeline and oil extraction initiatives -- these are non-negotiable actions to protect the planet, but they are still just the bare minimum, say climate activists Xiye Bastida and Shiv Soin. In conversation with radio researcher Latif Nasser, Bastida and Soin share their list of six crucial climate demands for world leaders -- and discuss how we all can get involved. (This segment was part of TED's Countdown Global Livestream on October 30, 2021.)

No one remembers when you're right, but no one forgets when you're wrong. Your local weather person knows that saying all too well. But while they take a lot of the heat (get it?), how much of it is actually justified? In this episode, Mona Chalabi looks at weather forecasting data to see how accurate these predictions really are, and gives us tips for when we should--and shouldn't--trust the forecast. Want to hear more from Mona? Check out her podcast Am I Normal? with Mona Chalabi, from the TED Audio Collective.

"How much more damage do we have to endure before we realize that it's cheaper to save this planet than to ruin it?" asks engineer and investor John Doerr. In conversation with Countdown cofounder Lindsay Levin, Doerr and systems innovator Ryan Panchadsaram lay out six big objectives that -- if pursued with speed and scale -- could transform society and get us to net-zero emissions by 2050. An action plan to solve the world's climate crisis, backed up by a proven system for setting goals for success.

As you get older, your eyes worsen and become susceptible to a disease called age-related macular degeneration -- the leading cause of blindness, with no cure in sight. Sharing the science of how your vision works, researcher Joshua Chu-Tan offers breakthrough insights on a lesser-known RNA that could change the treatment for this disease, preserving the gift of sight for longer and improving the quality of life for millions of people.

We've been hearing about self-driving cars for years, but autonomous vehicle entrepreneur Aicha Evans thinks we need to dream more daringly. In this exciting talk, she introduces us to robotaxis: fully autonomous, eco-friendly shuttles that would take you from place to place and take up less space on the streets than personal cars. Learn how this new technology works -- and what a future where we hail robotaxis would look like.

TED Fellow and education innovator Larry Irvin envisions a world where every child can see themselves reflected in their teachers. With his team at Brothers Empowered to Teach, Irvin is providing pathways to careers in education for Black men, who currently make up less than three percent of all teachers in the US -- offering training, personal and professional development and job placement. He shares how their holistic, people-centered approach is changing education.

What if we had a map of ... everything? Jack Dangermond, a visionary behind the geographic information system (GIS) technology used to map and analyze all kinds of complex data, walks us through the interconnected technologies gathering information about every crack and corner of the Earth. Learn how this "living atlas" and "geospatial nervous system" can help us better understand our changing planet -- and let nature guide our actions towards a more sustainable future.

Afternoon naps are refreshing -- but could they be messing up our sleep cycles? Sleep scientist Matt Walker reveals the pros and cons of napping, plus tips on how to get the most out of your next short snooze.

The financial sector often talks of decarbonizing investment portfolios as a way to fight climate change. But portfolios can be "cleaned" without having any real impact on the problem, says investment expert Nili Gilbert. Bringing science to finance, she unpacks how investors can actually help decarbonize the world -- a costly endeavor, estimated at three to five trillion dollars per year between now and 2050 -- and ensure the climate transition is just, global and interconnected. "Changing the markets can be a way to change the world," she says.

How we identify makes a difference in our lived experiences, but it's not always reflected in the checkboxes we see on forms. In this episode, Mona Chalabi explores why language matters in data collection, and why the categories we use should reflect who we really are. Want to hear more from Mona? Check out her podcast Am I Normal? with Mona Chalabi, from the TED Audio Collective.

We negotiate all the time at work -- for raises, promotions, time off -- and we usually go into it like it's a battle. But it's not about dominating, says organizational psychologist Ruchi Sinha. It's about crafting a relationship, understanding your needs and the other person's. Her three key steps will help you master this essential skill.

What we know today about global greenhouse gas emissions is mostly self-reported by countries, and those numbers (sometimes tallied manually on paper!) are often inaccurate and prone to manipulation. If we really want to get serious about fighting climate change, we need a way to track carbon pollution in real-time and identify the worst culprits, says high-tech environmental activist Gavin McCormick. Enter Climate TRACE: a coalition of scientists, activists and tech companies using satellite imagery, big data and AI to monitor and transparently report on all of the world's emissions as they happen -- and speed up meaningful climate action. A powerful, free, global tool to match the scale of a civilization-threatening crisis.

Questionable phone calls, concerning emails, heart-rending stories from a sudden new friend in need of endless financial support: elder abuse can take many forms, says lawyer Jane Walsh. And as technology becomes more sophisticated, susceptibility to tricks and scams will increase -- no matter a person's age or intellect. Walsh spotlights the rise of this predatory crime, why it goes undetected and how you can protect your loved ones' kindness, dignity and self-respect from being manipulated.