Photo Gallery The Smiling Sun
Danish activist Anne Lund designed the "Nuclear Power? No Thanks" logo that has become the symbol of the anti-nuclear movement.
Lund talked to SPIEGEL about how the "Smiling Sun" was born and why she never made any money from her design.
The logo has been seen at countless anti-nuclear demonstrations over the decades, such as this one near Hameln in Germany in March 1977.
The logo has been translated into many different languages, including French.
A version of the logo is seen against a Bavarian flag.
The logo also works well on an umbrella.
Multiple versions of the symbol are seen at a protest in Hamburg in May 2011.
Lund says she chose the sun because it looks friendly.
Lund gave the rights to the logo to a Danish anti-nuclear organization and never made any money from it.