xiaohaiyuwen283 (xiaohaiyuwen)

How thick is the submarine communication cable (optical fiber)? Will it be broken by fishing boat, earthquake, or submarines? Just to add something They are pretty chunky - 69 mm is sort of the standard. The optical fiber strands in the center are well guarded by steel cable to provide strength during the laying process. The ships that lay cable have underwater sled that digs a trench that buries the cable and covers it. Map of all the undersea cables

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What were early Earth's tides like? If you can picture the Moon hanging in the sky like a fist, you are getting close. It was not the quiet neighbor it is today. It was a bully, sixteen times closer-The story is true. Four billion years ago-the Moon was just 22,500 kilometers away-its gravity was a chain. Yanked hard on the planets new oceans. The tides were monsters. Not waves.

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Share music with you !! https://www.youtube.com/watch?v=6NNFg9XRobU

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@caichongjun Old man need friend ， Dog!!!

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