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NASA's InSight lander has been studying the Martian surface and subsurface since it landed in 2018, but the last two years have brought a new observation. 

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Have you ever noticed sound travels differently during a stormy or cloudy winter day? Or maybe noises sound a little different than normal? We saw lightning across many of our southern communities with today's rain, but many more of you heard thunder than saw lightning. What's going on?