Five eggs the size of Ping-Pong balls crack open as the tiny desert tortoises inside break through the shells. The two-inch-long babies immediately crawl off in search of flowers and grasses to eat. These animals may be newly hatched, but they already have survival skills that will allow them thrive in their harsh, sizzling-hot habitats.
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When organisms have undergone hundreds or millions of years of evolution, they have formed instincts that help them adapt to their surroundings.