The radiation warning symbol would tell them nothing: our simian descendants would crack open that container with an industrial sized can opener and start smearing the fluorescent toxic waste ...

In other countries, the black on yellow symbol is the most common colour combination. In 2011, the trefoil was registered by the International Organization for Standardization (ISO) to be recognized ...

A few users even thought that the sign was a radioactive warning symbol. “Everytime I go back to Perak, I always see this billboard. I asked my husband what it was, and he told me it means ...

Federal officials plan to post warning signs along a contaminated ... doesn’t use the universal symbol for radioactive material and may confuse visitors by referring to the material as ...