ADVERTISEMENT

Science Agenda

The Science That Matters
Tuesday, June 30, 2015

As Earth's Spin Slows, Clocks Get Another Leap Second

The history of the leap second reveals a curious pattern of decreasing frequency since its adoption 43 years ago

SA Chronicles: World War I — Explore 1,200 Articles from our Archive

Buy Now

Blogs

Videos

Editor's Picks

Podcasts

Citizen Science

More »

Education

More »

The perfect movie companion to
Jurassic World

Add promo-code: Jurassic
to your cart and get this digital issue for just $7.99!

Hurry this sale ends soon >

X

Email this Article

X