What if the entire 13.8-billion-year history of the universe fit into a single year? On this “cosmic calendar,” the Big Bang happens at midnight on January 1, while the first stars ignite just days ...
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How far have humans ventured in the universe?
The observable universe is the portion of the cosmos that we can see or detect from Earth, limited by the speed of light and the age of the universe. Since light has only had about 13.8 billion years ...
Knotted structures once imagined by Lord Kelvin may actually have shaped the universe’s earliest moments, according to new research showing how two powerful symmetries could have created stable ...
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