What If You Weighed 0 Pounds?

*What If You Weighed Nothing at All?* *What if you weighed nothing, but your mass stayed exactly the same?* Leo wakes up on the ceiling. He brushes his teeth upside down and clips himself to the porch so the breeze doesn't carry him off. With zero weight, he floats like a feather, but he still moves like a fridge: he's hard to push and hard to stop. His sister Mia, a rock climber, clips him in every morning with an orange carabiner that says "Stay down." Then a storm hits the sea cliffs and Mia's rope starts to fray. Leo can stay safely clipped to his anchor, or let go and launch himself down the cliff to save her, knowing nothing may ever bring him back down. In this video you'll learn: 🪶 The difference between weight and mass, and why it matters 👟 Why you can't walk without weight: no weight means no friction 🎈 Why air would slowly lift a weightless person into the sky 🦴 Why astronauts can lose about 1% of their hip bone density every month in orbit 😵 How tiny crystals in your inner ear called otoliths tell you which way is down 🛰️ Why astronauts on the ISS aren't weightless because gravity vanished. At 400 km up, they still feel about 90% of Earth's gravity, but they're falling around Earth at about 28,000 km/h Would you let go to save someone you love? Tell us in the comments 👇 🔔 Subscribe for Part Two, and for more What Ifs where we push one thing about the universe to the extreme and follow the real science. #WhatIf #Weightless #Gravity #Physics #Space #Science #Animation --- You can add chapters to either one once the edit is final, using the same layout as the earlier descriptions.