UKAstroNut's video: What is a Leap Second

Every few years, scientists decide that we need to add a second on to one of the days in the year. This is called a leap second. Midnight last for 2 seconds on our clocks, rather than one. But when this happens can seem random. So what is a leap second, why do we need one and what bad things can happen when you add a second in to the day? Twitter: https://twitter.com/UKAstroNut Facebook: https://www.facebook.com/UKAstroNut Website: http://www.ukastronut.co.uk Blog: http://ukastronutblog.blogspot.co.uk/ Image Credits: "Magellan GPS Blazer12" by Nachoman-au - Own work. Licensed under CC BY-SA 3.0 via Wikimedia Commons - https://commons.wikimedia.org/wiki/File:Magellan_GPS_Blazer12.jpg #/media/File:Magellan_GPS_Blazer12.jpg "London.bankofengland.arp" by Adrian Pingstone - Taken by Adrian Pingstone in November 2004 and released to the public domain.. Licensed under Public Domain via Wikimedia Commons - https://commons.wikimedia.org/wiki/File:London.bankofengland.arp.jpg #/media/File:London.bankofengland.arp.jpg "AEHF 1" by USAF (Los Angeles AFB) - http://www.losangeles.af.mil/art/media_search.asp?q=aehf&btnG.x=0&btnG.y=0 [1]. Licensed under Public Domain via Wikimedia Commons - https://commons.wikimedia.org/wiki/File:AEHF_1.jpg #/media/File:AEHF_1.jpg "Stopwatch2" by Hydrargyrum - enwiki. Licensed under Public Domain via Wikimedia Commons - https://commons.wikimedia.org/wiki/File:Stopwatch2.jpg #/media/File:Stopwatch2.jpg