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Scientists saw something amazing in space for the first time. They saw gravitational waves. These are waves in space. They move out from the centre. They start when big space objects hit each other. Albert Einstein first spoke about waves in space in 1916. One hundred years later, the researchers proved he was right. They used powerful technology to see the waves. Einstein did not have this technology. He used his genius.
Finding gravitational waves is a very important discovery. Scientists can now see many new things in space. A scientist said it was as important as the invention of the telescope. He said: "It has opened a new window on the universe." He added that: "Using gravitational waves to explore the universe will allow us to see things we could have never seen before." He said it was great that scientists found the waves 100 years after Einstein talked about them.
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