Why the Sun and Moon appear almost the same size

The Sun and Moon nearly match in size

The Sun and Moon appear nearly the same size in Earth’s sky because the Sun is about 400 times wider but also about 400 times farther away. This alignment allows both total and annular solar eclipses.

Ice redirected the Rhine through the English Channel

About 450,000 years ago, ice blocked the northern North Sea and forced the Rhine through the English Channel. The river’s mouth lay near Brest, and the Thames and Seine became tributaries of the Rhine.

Spiny mice can shed skin and grow it back

African spiny mice are the first mammals known to shed skin as an escape response. They can regrow complex skin, including hair follicles, glands, fur and cartilage, with little or no scarring.

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Why the Sun and Moon appear almost the same size

The Sun and Moon nearly match in size

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