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Tardigrade anatomy [3]. Tardigrades have a short plump body with four pairs of hollow unjointed legs. Most range from 0.1 to 0.5 mm (0.004 to 0.02 in) in length, although the largest species may reach 1.3 mm (0.051 in).
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One outstanding case in 2015 demonstrated a frozen moss sample from 1983 that contained tardigrades. From this sample, 2 tardigrades and 1 egg survived, despite being placed in -20 degrees Celsius for 30.5 years. These surviving tardigrades and tardigrade eggs were Acutuncus antarcticus, giving them the longest record of survival for ...
Tardigrades can withstand 1,000 times more radiation than other animals, [17] median lethal doses of 5,000 Gy (of gamma rays) and 6,200 Gy (of heavy ions) in hydrated animals (5 to 10 Gy could be fatal to a human). [18] Earlier experiments attributed this to their lowered water content, providing fewer reactants for ionizing radiation. [18]
Tardigrades are affectionately known as water bears or moss piglets and are tiny invertebrates measuring a maximum of 0.05 inches in length. Viewed through a microscope, they look a little like a ...
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