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The animal kingdom can be a dangerous place. Bigger animals hunt smaller animals for food. This is a huge problem for the smaller animals. To solve this problem, the prey need to develop ways to outsmart their predators. One amazing defense mechanism that some lizards developed is called autonomy. When attacked, certain lizards can actually detach their tails from their bodies. The tail keeps wagging for several minutes or more, distracting the predator. Meanwhile, the lizard scurries off to safety, solving the lizard's immediate problem.

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In 1835, James Bowman invented the light bulb, which uses electricity to make light. This invention caused huge changes across the world. In a basic sense, this new and easy way of creating light meant that it was now much easier to perform tasks after dark. As a result of the light bulb, businesses could stay open later. Homes and streets were now better lit for nighttime activity. It also made things safer, as the gaslights that were used before light bulbs could be very dangerous

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A butterfly's life cycle comes in four stages. First, a butterfly lays its eggs, which take only about five days to hatch. In stage two, a caterpillar emerges from the egg and starts eating everything in sight. When the caterpillar is done growing, it enters stage three and begins making a protective shell called a chrysalis. Inside the chrysalis, the caterpillar turns into a butterfly. In stage four, the chrysalis opens to reveal a beautiful butterfly. Eventually, it lays eggs, and the cycle begins again.