When I was young, I remember we were first taught to read time on a clock or watch face. Then we learned to flip or cross off dates on day/weekly/monthly calendar. Now in old age and retired, we often forget what day of the week today is since every day is the same. Because of such needs, a new dev ...
Weekly Headlines (Excerpts) 1. UV-C light kills nearly everything—except this unusual organism Built-in Sun protection might be a blueprint for surviving in space 27 Jun 2025 ByHannah Richter 2. Japan’s new s ...
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天文地理集大成者——托勒密
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