English artist Stuart Semple released “2057 pink smiley faced clouds float from the Tate Modern over Londons Southbank towards the financial district.” Why? To make people happy.

Nice touch: they were made to disappear after 30 minutes (so they are pink and “green”).

YouTube – Stuart Semple, Happy Clouds, Tate Modern, Southbank, London

(Tip to AndrewSullivan.com)

“In the depths of winter I finally learned there was in me an invincible summer.” — Albert Camus