Unbelievable Facts about the Great Wall of China! — Transcript

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1. 0:00Some unbelievable facts about the Great
2. 0:02Wall of China. Did you know it's said
3. 0:04to be the only man-made structure
4. 0:05visible from space? But that is not
5. 0:08true. Even if you try to see it from
6. 0:09low Earth orbit, you won't be able to
7. 0:11spot it. But that doesn't mean it isn't
8. 0:13an amazing structure in its own right.
9. 0:14This wall is 2,500 years old. Chinese
10. 0:17emperors built it to protect their land
11. 0:19from invaders. But building a wall is
12. 0:21actually a bit of a flop idea. Because
13. 0:23many times, this wall has been breached
14. 0:25by invaders. The Great Wall is actually
15. 0:28not a single straight line of wall, but
16. 0:30many different walls running parallel
17. 0:31to each other. Sometimes, there are
18. 0:33even large gaps present between these
19. 0:35walls. But if you look at the total
20. 0:37length of the entire Great Wall of
21. 0:39China by adding all these walls, it
22. 0:41comes to 21,196 km. That's half the
23. 0:43size of Earth's equator. And you know,
24. 0:45it's not like the entire wall was built
25. 0:47using a single material either. In some
26. 0:49places, bricks have been used. In some,
27. 0:51granite, in some marble blocks, and in
28. 0:53others, wood. In fact, in some places,
29. 0:55sticky rice has even been used in the
30. 0:57mortar to build this wall.