Yep. The extra second is the 60th second. http://earthsky.org/human-world/leap-second-june-30-december-31-why-need-controversy http://earthsky.org/human-world/l

Yep. The extra second is the 60th second. http://earthsky.org/human-world/leap-second-june-30-december-31-why-need-controversy http://earthsky.org/human-world/leap-second-june-30-december...