Danger signs ? What danger signs ?
FIXME: I want some nice public-domain images of
More subtle danger signs:
Pretty waves reflecting the sun … hello, what’s this ? It’s not my fault!
“anything radioactive: Exploring the fun side of nuclear radiation” http://anythingradioactive.com/
"Warning Signs for Tomorrow" by Lifeboat Foundation Scientific Advisory Board member Anders Sandberg.
Including, among other signs: