On Feb. 18, 1979, snow fell in the Sahara Desert in southern Algeria for the first known time. It fell a second time in 2016 and a third time in 2018.
The solar eclipse is one of the most amazing astronomical events that draws astronomers and sky viewers alike. Because they ...
Planetary systems in the Milky Way galaxy tend to follow a particular pattern: rocky planets toward the center, closest to ...
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