Dinosaurs Are Still Alive Right Now (It’s not what you think) | Feynman Explains Why скачать в хорошем качестве

Dinosaurs Are Still Alive Right Now (It’s not what you think) | Feynman Explains Why

An alien 65 million light years away looks at Earth through a telescope. What does he see? Not us. Not cities. Dinosaurs. A T-Rex walking through a jungle. Here’s the question: Is the dinosaur there? You say no—it’s dead, bones in a museum. But to the alien, the dinosaur is moving, breathing, hunting. The light from that dinosaur is hitting his eye right now. For him, that event is happening now. If we’re on Earth, we say the dinosaur is the past. But for the alien, the dinosaur is the present. So who’s right? The Answer: Both. The past and future are not absolute. They’re like a loaf of sausage that can be sliced at different angles. This is relativity. Light takes time to travel. When you look at your hand, you see it as it was a billionth of a second ago. When you look at the sun, you see it as it was 8 minutes ago. You never see the present. You always see ghosts. Ole Rømer discovered this in 1676 watching Jupiter’s moon Io. When Earth was far from Jupiter, the moon appeared late. Not because the moon was slow—because light takes 16 minutes to cross Earth’s orbit. The speed of light is always the same—186,000 miles per second—no matter how fast you’re moving. This breaks space and time. If the speed is fixed, your ruler must shrink and your clock must slow down. When you move, you slice spacetime at a different angle. Your “now” tilts. If the alien rides a bicycle away from Earth, his now slice tilts into the past—into the Jurassic period. If he rides toward Earth, his now tilts into the future. If different observers slice spacetime at different angles, all parts of the sausage must be real. The past is not gone—it’s just down the sausage. The future is not empty—it’s just up the sausage. We live in a block universe. A four-dimensional frozen block where everything that ever happened still exists. The T-Rex is still hunting. You are being born. You are dying. It’s all there in spacetime. The speed limit exists to protect causality—to make sure cause comes before effect. Seeing is a delayed electromagnetic jiggle. An electron in the sun jiggles, creates a wave, travels at light speed, hits an electron in your eye. The delay gives us separation, individuality, history. The past still exists. The future already exists. We’re musicians playing a symphony that’s already written. We can only play one note at a time, but the entire score is there. You are always seeing ghosts. And somewhere, 65 million light years away, an alien sees a T-Rex. And he’s right. And we’re right. Because in spacetime, everything that ever was and will be is dancing together. ⚠️ AI-Generated Content Inspired by Feynman’s teaching. Educational purposes.