Episode 1: 恐龙为什么灭了?Why did the dinosaurs disappear?
Together, we discover what life was like when dinosaurs ruled the Earth, what scientists believe caused their sudden disappearance, and the surprising twist that means dinosaurs never truly went away.
Episode 2: 天空为什么是蓝色的?Why is the sky blue?
Together, we discover that sunlight is hiding all the colors of the rainbow, what happens when light crashes into the tiny particles in our atmosphere, and why sunsets turn everything orange and red.
Episode 3: 为什么会有白天和黑夜?Why do we have day and night?
Together, we discover that the Earth never stops spinning, what that means for every family on the other side of the world right now, and why we never feel the ground moving beneath our feet.
Episode 4: 火山为什么会爆发?Why do volcanoes erupt?
Together, we discover what's been boiling beneath the Earth's surface all along, how pressure builds until the planet has no choice but to let it out, and why volcanoes — as destructive as they are — helped create the world we live in today.
Episode 5: 狗狗为什么会摇尾巴?Why do dogs wag their tails?
Together, we discover that a wagging tail isn't just one thing — it can mean excited, curious, or even nervous — and how paying close attention to how a dog wags can tell us what they're really feeling.
Episode 6: 为什么那么多种语言?Why are there so many languages?
Together, we discover that the world is home to thousands of different languages, why a mountain or an ocean between two villages can eventually turn into two completely different ways of speaking, and how one small country ended up with more languages than almost anywhere else on Earth.
Episode 7: 我们为什么会换? Why do we lose our baby teeth?
Together, we discover that baby teeth were never meant to stay forever — they're placeholders, holding space for something stronger growing in underneath — and what's really happening under the gums long before a tooth ever falls out, and the animal that grows thousands of teeth in its lifetime.
Episode 8: 我们为什么会感到疼痛?Why do we feel pain?
Together, we discover that pain is actually your body's alarm system — tiny nerves running all through you send an urgent signal to your brain in less than a second — and what happens to the rare people who are born unable to feel pain at all.
Episode 9: 我为什么需要睡觉?Why do we need sleep?
Together, we discover that sleep isn’t time off at all. While you sleep, your brain sorts and saves everything you learned that day, and your body quietly repairs your muscles. Your brain even switches on its own cleaning system that can only run while you’re asleep.
Episode 10: 宝宝是从哪里来的?Where Do Babies Come From?
Together, we discover that every one of us started out as one tiny cell, too small to see. That cell grew slowly inside a warm, safe place in Mom’s body for nine whole months, kicking, yawning, and even dreaming along the way. And from the very beginning, each baby is completely one of a kind.