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WSJ on Twitter: When is the summer solstice and what is the science behind it? Here’s what to know as the sun reaches its most northerly point in the sky and the Northern Hemisphere marks its longest day this year. on.wsj.com/3OtUmTC

When is the summer solstice and what is the science behind it? Here’s what to know as the sun reaches its most northerly point in the sky and the Northern Hemisphere marks its longest day this year. on.wsj.com/3OtUmTC


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WSJ on Twitter