Person of interest

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Albert Einstein, the man who introduced the "Theory oF relativity" (1905-1916).

Country of origin : Germany

Although this wild-haired physicist didn't study the cosmos through a telescope (his tool of choice was mathematics), Einstein laid the foundation for modern physics and our understanding of the relationship between time and space. His observations led him to believe that the laws of physics -and the speed of light -stay the same no matter your location and motion in the universe. He also explained that space and time are not two separate things. They're tied to each other in a concept he called space-time. What's more, Einstein discovered that space and time become distorted (or curved) by strong gravitational fields, such as those given off by large stars or black holes. This, Einstein theorized, can lead to all sorts of wild effects, including time travel.