TED Talks Daily (HD video)

The people of Palau -- a pristine ocean state made up of more than 300 islands in the western Pacific -- warmly welcome travelers to their home every year. But the guests don't always know how to protect the country's beautiful beaches and coral atolls. Enter the Palau Pledge: an environmental pledge that's now part of visitors' visas, where they promise to "tread lightly, act kindly and explore mindfully" -- while respecting the country's culture and heritage. (Thanks to Jennifer Koskelin-Gibbons and Susan Kloulechad)

Vegan chef (and head chef of TED Countdown Summit) Derek Sarno is on a mission to unleash the mighty power of plants, creating nutritious food from mushrooms and vegetables that's full of texture and flavor -- and good for the planet. He dishes out some creative cooking inspiration and shares how his personal journey led him to create amazing food that avoids animal suffering.

When it comes to big problems like climate change, we tend to focus on big solutions -- but many of the best ideas come from people on the ground, facing day-to-day conservation battles. Sharing her effort to protect the Leseur ecosystem in Indonesia (the last place on Earth where the Sumatran rhino, tiger, elephant and orangutan still roam together in the wild), TED Fellow and conservationist Farwiza Farhan explains the challenges women face on the front lines of forest preservation within patriarchal societies -- and the resilient, world-changing power they hold.

As a diver in the 1970s, marine ecologist Enric Sala saw once-lush oceanscapes reduced to underwater deserts -- but later, in marine preserves across the globe, he also witnessed the ocean's power to rejuvenate itself when left to its own natural devices. Could rewilding the planet help us restore biodiversity and reduce the impacts of climate change? Sala presents the 30x30 initiative: a global plan to protect 30 percent of the Earth's surface and the ocean floor by 2030.

Africa needs new energy sources to fuel its development, but the continent should invest in renewable energy instead of cheap, polluting alternatives like coal, says climate inclusion activist Chibeze Ezekiel. He tells the story of how he worked with local communities in Ghana to halt the construction of the country's first coal power plant -- and encouraged the government to prioritize investments in renewable energy instead. "Development and clean, breathable air should not be mutually exclusive," Ezekiel says.

Want a healthier love life? Get better sleep, says sleep scientist Matt Walker. In this episode, he explains how getting more quality shut-eye can boost fertility and vitality -- plus how sex can even improve your sleep.

Who are you, really? Neuroscientist Anil Seth lays out his fascinating new theory of consciousness and self, centered on the notion that we "predict" the world into existence. From sleep to memory and everything in between, Seth explores the reality we experience in our brains -- versus the world as it objectively might be. (This talk and conversation, hosted by TED science curator David Biello, was part of a TED Membership event. Visit ted.com/membership to become a TED Member.)

When it comes to tackling climate change, the size of a country doesn't matter -- it's their ambition that counts, says First Minister of Scotland Nicola Sturgeon. In a rousing talk, she shares examples of small nations -- from Bhutan and Fiji to her own Scotland -- whose leadership and climate action are galvanizing change on the international stage. (Followed by a brief Q&A with TED's global curator Bruno Giussani about the Cambo oil field project)

When it comes to making a baby, we know it takes two to tango. So why do the pressures of fertility often fall on only one half of the equation? In this video, data journalist Mona Chalabi examines some of the big misconceptions around fertility, shares significant blind spots in the data, and reveals why we need more research on sperm. Want to hear more from Mona? Check out her podcast Am I Normal? with Mona Chalabi, from the TED Audio Collective.

What if your hour-long commute was reduced to just minutes? That's the promise of the hyperloop: a transit system designed around a pod that zooms through a vacuum-sealed space (roughly the size of a subway tunnel) at hyper-speed, powered by next-generation batteries and state-of-the-art magnetic levitation. In the visionary talk, Josh Giegel, the hyperloop's very first passenger, shares how this zipping innovation could launch us into a faster, cleaner future of transportation.

What if we started treating parenting like the real work it is? Podcast host and CEO Angela Garbes details how working families have evolved -- and how companies haven't -- and gives insight into what parents really need from their colleagues and workplaces.

Great ideas are like electricity -- they snap into sharp focus and sprint from place to place. What's the best way to capture them? Bozoma Saint John, Chief Marketing Officer at Netflix, makes a compelling case to move away from an overreliance on data when making big decisions -- and calls on us all to tap into the power of our intuition and become creative trailblazers.

From puffy trousers to pantsuits and everything in between, law professor and author Richard Thompson Ford takes us on a fascinating tour through the history of fashion and the evolution of dress codes that still influence style today, tracing the real consequences people face for the way they dress. He offers an insightful and eye-opening explanation about why people care so much about what others wear -- and explains why you should think twice before calling the fashion police.

Refrigerators do much more than store your groceries -- they're also vital to preserving and distributing vaccines. Illustrating the realities of (and threats to) global vaccine supply chains, technologist and TED Fellow Nithya Ramanathan describes how smart sensors placed in fridges that store medical supplies can provide crucial, real-time data and ensure people get the life-saving care they need.

For places that observe daylight saving time, gaining an hour of sleep every November -- or losing an hour every March -- doesn't just affect how well-rested (or caffeinated) people are. The effects of the semi-annual time change are far-reaching, drastically changing stroke and car accident rates, stock prices and more! Sleep scientist Matt Walker shares the surprising consequences of DST, and what they can teach us about improving our own sleep health.