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The world's smallest mammal is the bumblebee bat, which weighs less than a penny.
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The world's largest organism is a fungus called Armillaria ostoyae, which covers 2,200 acres in Oregon.
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The world's deepest postbox is located 10 meters undervwater in Susami Bay, Japan.
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The world's oldest known sample of the smallpox virus was found in the teeth of a 17th-century Lithuanian woman.
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The world's tallest mammal is the giraffe, which can reach up to 18 feet in height.
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The world's largest volcano is the Tamu Massif, located in the Pacific Ocean.
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The world's oldest known sample of DNA is from a horse that lived around 700,000 years.
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The world's largest living organism is a fungus called the Humongous Fungus, which covers 2,200 acres in Oregon.
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The world's oldest known sample of the common cold virus was found in the nose of a 17th-century Lithuanian woman.
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The world's largest amphibian is the Chinese giant salamander, which can grow up to 6 feet in length.
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The world's oldest known sample of the influenza virus was found in the lungs of a 17th-century Lithuanian woman.
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The world's largest bird is the ostrich, which can weigh up to 345 pounds.
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The world's oldest known sample of the herpes virus was found in the saliva of a 17th-century Lithuanian woman.
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The world's tallest tree isa coast redwood called Hyperion, which stands at 379.7 feet.
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The world's oldest known sample of the HPV virus was found in the cervical cells of a 17th-century Lithuanian woman.
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The world's deepest fish is the Mariana snailfish, which lives at a depth of 8,178 meters.
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The world's largest insect is the goliath beetle, which can weigh up to 3.5 ounces.
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The world's oldest known sample of the rabies virus was found in the brain of a 17th-century Lithuanian woman.
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The world's largest reptile is the saltwater crocodile, which can grow up to 23 feet in length.
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The world's oldest known sample of the rotavirus was found in the feces ofa 17th-century Lithuanian woman.