TED Talks Daily (HD video)

We all experience it: that desire to do something wrong just for the sake of it. Whether it's walking on manicured grass or sticking your finger in a friend's ice cream, psychologist Paul Bloom invites us to see the clever, creative and beautiful side of these minor impulses to do bad. He dives into the psychology behind this all-too-human condition -- and proposes that it helps make our world a little more unpredictable and fun.

Know you should establish clear limits at work but not sure how to do it? Here are a few strategies from relationship therapist and author Nedra Glover Tawwab that can help you feel more empowered and less overwhelmed, both on and off the job.

The emergence of data-driven mass surveillance "is threatening to turn privacy into a relic of the 20th century," says the anonymous YouTube creator known as Ordinary Things. Meanwhile, state-funded troll farms are spreading disinformation and curating chaos on platforms meant to connect us and revolutionize the way we live. Ordinary Things gives an enlightening account of the internet's strengths and weaknesses, warning that the fight for a free internet is a fight for our collective future.

What comes to mind when you think about the most fun moments of your life? Science journalist Catherine Price asked thousands of people across the world this question, and their answers led her to a new definition of "true" fun: a special confluence of playfulness, connection and flow. Hear her thoughts on why having fun is good for your mental and physical health and how to identify the tell-tale signs of "fake" fun -- as well as actionable tips for identifying what brings you joy. (This conversation, hosted by TED science curator David Biello, was part of an exclusive TED Membership event. Visit ted.com/membership to become a TED Member.)

What does an in-flight meal look like when you're traveling to Mars? Designer Phnam Bagley envisions a future where astronauts have nourishing, flavorful food reminiscent of home -- a giant leap from their current staple of "goop-in-a-bag." Learn more about her team's gourmet creations for galactic travel and how these innovations can improve life here on Earth.

Video games naturally tap into the way we learn: they focus our attention and track our progress as we head toward a clear goal. Kris Alexander, a professor of video game design and passionate gamer himself, thinks the same elements should be used in traditional education to cater to different learning styles and engage students across the world, both in-person and online.

Collaboration in the workplace is more important than ever -- but it's making us less productive in some ways. Here's what collaboration pioneer Rob Cross says is driving us to take on way too much -- and how we can reclaim our time and our peace of mind.

Why aren't more people investing in Africa's green energy? Environmental researcher Rebekah Shirley outlines the continent's immense potential for renewable power and calls for collaborative international investment -- and partnership -- in Africa's climate future. "Let's cut past the talk and focus on unleashing the avalanche of a clean energy future that Africa is ready to deliver," says Shirley.

Meet the fantastically colorful and astonishingly adaptable sea slugs that found a way to photosynthesize (or create energy from sunlight) like plants. Diving deep into these often overlooked creatures, invertebrate zoologist Michael Middlebrooks introduces the solar-powered slugs that lost their shells -- but gained the ability to directly harness the power of the sun.

When programmer Tiffani Ashley Bell learned that thousands of people in Detroit were facing water shutoffs because they couldn't afford to pay their bills, she decided to take action -- in the simplest, most obvious way possible. It's an inspiring story of how one person with tenacity and an idea can create monumental change -- and a demonstration that each of us can find our own way to help the world, even if it means starting without all the answers.

Stuck in an unfulfilling or stagnant job? To achieve a smooth departure without burning bridges, try this three-step exit strategy from career coach Gala Jackson. She'll help you move on to your next position with courage, confidence and clarity.

Scientist Saad Bhamla is on a mission to answer a question most people don't think to ask: How do insects pee? Taking inspiration from the incredible "butt flickers" of the glassy-winged sharpshooter, Bhamla presents a fascinating study of the physics behind how bugs take care of business and invites us to be more curious about the seemingly mundane.

Take a graffiti tour through ancient Pompeii with Roman archaeologist Jacqueline DiBiasie-Sammons and discover what 2,000-year-old scribblings from antiquity can teach us about life in modern times. A fascinating reminder of what we leave behind for future generations.

As a sports scientist, athlete and director of the Female Athlete Program at Boston Children's Hospital, Kate Ackerman understands that women athletes need more than pretty sports bras or new sneakers to achieve peak performance -- they need true investment committed to their health and well-being. Ackerman advocates for a long overdue sports medical system that's dedicated to the study and development of women athletes, supporting lifelong success on and off the field.

There's something simple we can all do to help the planet -- and it's probably not what you think. With one-third of all the food we produce globally each year being thrown away, entrepreneur Tessa Clarke believes that sharing more and wasting less is an underrated solution to the climate crisis. Learn more about how you can join the growing movement reducing waste and building community worldwide.