ST. LOUIS – The sky is always changing colors—from a bright blue on a clear day, to red and orange sunrises or sunsets, or multiple colors of a rainbow—there’s a lot going on that we don’t always ...

Add aerosols to the stratosphere, and sunlight is reflected into space, cooling Earth’s surface. Volcanoes have done it, so why can’t humans? That’s the basic idea behind stratospheric aerosol ...

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The arrival of daylight saving time on Sunday means that there will be a delay in seeing the stars shine at night. On Saturday, people are advised to set their clocks an hour ahead, as daylight saving ...