On the Cosmic Calendar, the entire 14-billion-year history of the Universe is compressed into a single calendar year. The Big Bang occurs at the stroke of midnight on January 1, and right now is midnight one year later. Match the following major events to their (approximate)time on the Cosmic Calendar. square First mammals evolved square Extinction of the dinosaurs A. September 22 B. December 31 at 1:35 p.m. C. December 31 at 11:59:49 p.m. D. January 1 at 00:00 E. December 4 F. December 31 at 2:00 a.m. G. December 30 H. December 26 square Early life on Earth square The Big Bang square Egyption pyramids built

* **The Big Bang:** D. January 1 at 00:00 (This is the starting point of the Cosmic Calendar)<br /><br />* **Early life on Earth:** B. December 31 at 1:35 p.m. (Life arose relatively early in Earth's history, which is compressed into the last day of the Cosmic Calendar)<br /><br />* **First mammals evolved:** H. December 26 (Mammals evolved significantly later than early life)<br /><br />* **Extinction of the dinosaurs:** G. December 30 (The dinosaurs went extinct relatively recently on the Cosmic Calendar, just a couple of "days" before the present)<br /><br />* **Egyptian pyramids built:** C. December 31 at 11:59:49 p.m. (Human history, including the construction of the pyramids, occupies only the last few seconds of the Cosmic Calendar)<br />