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Can scientists determine the size of the universe? https://t.co/j6VhoD89r9 https://t.co/tCJ87WQjvU

SPACEdotcom: Can scientists determine the size of the universe? https://t.co/j6VhoD89r9 https://t.co/tCJ87WQjvU - 2017-09-19 20:00:48