Michael Stevens Instagram – Behold: The Astonishing Ruler. We’ve made a ruler that’s exactly one light-nanosecond long and can be used to measure things in light-picoseconds, microeverests (millionths of Mt. Everest’s height), beard fortnights (length a typical beard grows in two weeks), sound-microseconds (distance sound travels in a millionth of a second), decimal inches, and centimeters! You can only get it by subscribing to the Curiosity Box NOW (before the current box is sold out). THIS WEEKEND ONLY: sign up for a year and YOUR FIRST BOX IS FREE!!!!! Thanks to everyone who already subscribes! You’re helping us make the world a more curious place!!! 👉CuriosityBox.com/join👈