It's hard to argue the radiation symbol inherently indicates danger though. That our seemingly natural reaction to it is "beware" can only be the result of lea

It's hard to argue the radiation symbol inherently indicates danger though. That our seemingly natural reaction to it is "beware" can only be the result of learning the meaning of it. Unlike, say, signs showing "danger to cyclists" by literally depicting a cyclist flying off their bike (https://www.roadtrafficsigns.com/signs/cyclists-falling-on-streetcar-track-symbol/sku-k-9082 https://www.roadtrafficsigns.com/signs/cyclists-falling-on-s... - actually the only place I recall seeing signs like this was NZ).