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Jonathan Bachman / Reuters The Lost Victorian Art of Egg Collecting
The practice has fallen out of favor, but museum stores of 19th-century bird eggs can still provide modern-day scientists with valuable information.
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Laurence Mouton / ZenShui / Corbis How Ancient Coral Revealed the Changing Length of a Year
The lines on fossilized specimens show that millions of years ago, it took 420 days for the Earth to complete an orbit around the sun.
