Checker pulse

 

 

I dig it!!!

Credits: Pi-Slices and Tumblr via Panah Rad, Rad GIFs & Videos and Google+

Caged rotation

 

For a traveller going from any place toward the north, that pole of the daily rotation gradually climbs higher, while the opposite pole drops down an equal amount.

 – Nicolaus Copernicus

Credits: Pi-Slices and Tumblr via Al Heden Chrism‎, Awesome GIF’s and Facebook, BrainyQuote