Middle school is a time like no other, as significant biological and emotional changes coincide with profound personal growth, says educator Jerome Hunter. The middle school for boys that he founded centers on a program that helps redefine masculinity through what he calls the three "Cs" -- confidence, communication and community. He shares the growth he's seen when boys are encouraged to explore their own empathy -- and how it could lead to a more just world.

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.