Why danger symbols can t last forever

How to design fear, explained with 99 Invisible. Check them out here: Correction: The correct spelling of warning in Persian is هشدار. Watch the previous episode from this series: Subscribe to our channel Chances are you wouldnt be able to recognize a biohazard even if you were looking right at one. But the biohazard symbol Its pretty easy to spot. Most warning icons rely on previously established objects or symbols:a general caution might use an exclamation point, and a fire warning might use an illustration of a flame. But the biohazard symbol references an idea that is much harder to pictureand in the 50 years since its invention, it has become one of the most recognizable icons on the planet. But can the meaning of a symbol like this last an eternity A special Department of Energy project is trying to figure that out. Read more: This video was made in partnership with 99 Invisible, a podcast about all the