To better understand the scale of time and feed your existential dread, Wylie Overstreet and Alex Gorosh used LED lights spread miles across a desert, proportional to milestones in the history of the universe. The model stretched 4.3 miles to represent 13.8 trillion years.
See also the seven-mile scale model of the Solar System, which is another video in their To Scale series. [via kottke]
