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Physics, 27.07.2019 04:00, eweqwee3147
Why do plants not have a exsited before cyanobacteria started producing oxygen?
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Physics, 21.06.2019 18:40, robert7248
Carbon-14 is a radioactive element that undergoes beta decay. which force is responsible for allowing carbon-14 to become stable? electromagnetic gravitational weak nuclear strong nuclear
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