Acne is a condition in which the sebaceous (oil) glands become overactive and inflamed, causing a breakout of pimples on the skin. In severe acne, infections and abscesses form in the oil glands….
Many animals protect themselves by pretending. The frilled lizard is small and harmless. But it pretends to be big and dangerous. When it opens its mouth its throat is bright red and frightening. A…
Turn the key at the back of the alarm clock once . . . twice . . . three times. At first the key turns easily. But as you keep winding, the key turns harder and harder. Finally the clock is wound as…
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