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EntertainmentThe cure for insomnia is much simpler than we thought
More and more Americans are living on sleeping pills to give them a complete rest.Very simple remedy cures chronic insomnia
Insomnia not only seriously affects daily activities, but also harms health.
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Xinjiang - The Unincorporated Area in China
How many days on Earth is one day on the Moon?
Hubble telescope captures image of 'bridge' connecting two galaxies
Why is interstellar travel impossible today?
When cattle in a herd are attacked, why don't the others help?
In ancient times, there was no market in the palace, so where did the concubines spend their monthly money?
Ancient Diaries Reveal the Construction of the Great Pyramid of Giza
Discovery of mysterious dwarf planet beyond Neptune stuns astronomers
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