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Why Do People Wear Costumes on Halloween?

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People wear costumes on Halloween because the holiday brought together traditions of disguise, visiting, entertainment, and make-believe. Masks could turn familiar neighbors into mysterious visitors, while later parties and commercial costumes widened the choice of characters. The modern American custom has several historical layers. A ghost, a superhero, and a homemade animal outfit can all belong to the same celebration because dressing up became a tradition in its own right, beyond any single belief about spirits. Halloween's setting helps explain its ghostly wardrobe. The National Museum of Ireland describes Samhain as marking the first day of winter on November 1, with much of the celebration taking place the previous evening. Traditions included feasting, games, and expectations that the dead might return. The name Halloween also connects to the eve of the Christian Feast of All Saints. Seasonal customs and religious observances provide the background for a night associate...

Why is the Moon Covered with Craters?

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The heavenly bodies were formed when smaller bodies, a few kilometers across, collided together. Eventually, when the stars, the planets and the satellites were formed, their surfaces were cratered by later collisions. The craters on the moon were formed during the first few hundred million years of the moon. They have remained so since they were formed. The moon cooled down quickly and preserved them forever. Moreover, there is no atmosphere to produce wind sand weather which could wear down these craters to some extent. In contrast, the Earth's craters have been worn away by wind and rain. The Earth's crust is thinner and the surface has buckled and split.