YouTube description: The history of the Earth from its formation to present day, covering major events throughout its 4-billion-year history. Estimates of average temperature, atmospheric composition,... continue reading
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From Twitter: Neil deGrasse Tyson @neiltyson Astrophysicist In the tropics, the Sun sets vertical to the horizon; Twilight doesn’t last very long; and the Full Moon rises shortly after sunset,... continue reading
posted by BSR 4 years 10 months 1 week ago • 49 views • 30 secs- 1