How Far Away Is the Horizon?
The distance to the horizon, the imaginary line where the sky seems to meet the earth, depends on how high our eyes are above the level of the land we are looking...
Read MoreThe distance to the horizon, the imaginary line where the sky seems to meet the earth, depends on how high our eyes are above the level of the land we are looking...
Read MoreHow Many Eyes Does a Fly Have? The head of a fly is almost “all eyes.” Most flies have four eyes—two large compound eyes and two tiny simple ones called “ocelli.” But...
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