How Long Is One Second, Really? Do we really know how long a second is? The science behind how time is actually measured may prove you wrong. Facebook Prev Article Next Article Discover Checkout these cool gadgets... Related Posts The 12 biggest science stories of 2016 Do You Have The Right Personality For Long-Term Space Travel? How Does a Gas Pump Know When to Stop Pumping? How Hulk Was Created for The Avengers Time Traveler Caught On Film How Much Acceleration Can the Human Body Take?