age of earth معنى"age of earth" أمثلة على "age" معنى "of" معنى "earth" معنى "age" معنى "the age" معنى "earth" معنى "in the earth" معنى "to the earth" معنى "earth–moon–earth communication" معنى "age (geology)" معنى "age adjustment" معنى "age and society" معنى "age appropriateness" معنى "age at death" معنى "age at marriage" معنى "age at retirement" معنى "age bracket" معنى "age class" معنى "age composition" معنى "age determination" معنى "age differences" معنى "age distribution" معنى "age grade" معنى "age group" معنى "age groups" معنى أمثلة In 1862, the physicist William Thomson, 1st Baron Kelvin published calculations that fixed the age of Earth at between 20 million and 400 million years.
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