Chinese scientists have opened the deepest and largest underground lab in the world.
The newly expanded facility, located around 7,800 feet below the Jinping Mountains, will allow scientists to study dark matter, the mysterious substance that’s believed to account for more than 80 percent of the mass in the universe.
While scientists believe it’s the “glue” that holds the structures of the universe together, we have yet to directly observe it, since it’s thought to be unable to interact with other matter or reflect or absorb light.
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