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 Why 23 million Americans don’t have fast internet What it looks like in the Arctic Circle When the Sun Never Sets The Coldest Spot in the Universe Will Be Man-made This Unorthodox Procedure Makes Short People A Foot Taller Overpopulation – The Human Explosion Explained The Explosion that Transformed Astronomy