Carl Sagan's Cosmic Calendar, in which the entire 13.75 billion-year history of the universe is scaled down to a single year. At this scale, the Earth formed in August, life arose in September, and the first land plants appeared in mid-December. Apes did not appear until the very last day of the year. The first humans show up in the last six minutes and civilization in the final 30 seconds.
Lunar | Moon | Astrology | 2017 Astrology Calendar - Cosmic Calendar with Zodiac, Chakras as Mandala Art / Chart] 18"x24" Full Color Poster
Cosmic Calendar - Wikipedia, the free encyclopedia | The 13.8 billion year history of the universe mapped onto a single year, as popularized by Carl Sagan. At this scale the Big Bang takes place on January 1 at midnight, the current time is December 31 at midnight, and the longest human life is a blink of an eye (about 1/4th of a second).