Scientists detect mysterious signal nearly 1 mile underground in South Dakota; plus, your Labor Day weekend forecast

Scientists in South Dakota detected an unusual particle interaction that has resisted other explanations. Researchers say it appeared where they would expect dark matter to show up.

Also, the best bet for rain-free weather for the Labor Day weekend will be in the middle of the nation due to a heat dome. Meanwhile, showers and storms will roam the edges from the West to the Canada border and in the East.

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