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jiwoojiwoo
@koreanria
"#Digging into the Earth #Earth was born about 4.6 billion years ago #Earth's rotation period is about 365.25 days #So every 4 years there are 366 days, which makes February 29th a birthday #2Birthdays on February 29th are celebrated wildly #You only get to celebrate 25 times in 100 years"
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