younth's Activity (128)
younth added a news bookmark.On Wednesday, April 20, Treasury Secretary Jacob J. Lew announced that Harriet Tubman will replace Andrew Jackson, the seventh President of the United States, on the $20 bill. T...About 6 years ago
younth added a news bookmark.This past week was an exciting one for astronomy fans. That's because two comets — 252P and the P/2016 BA14 — were scheduled to make their closest approach to Earth, back-to-bac...About 6 years ago
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