> The radioactive symbol (trefoil) was invented in 1946. In 2007 a new supplementary symbol was created. Sure it still includes a trefoil, but it's smaller. IS

> The radioactive symbol (trefoil) was invented in 1946. In 2007 a new supplementary symbol was created. Sure it still includes a trefoil, but it's smaller. ISO 21482: > On February 15, 2007, two groups—the International Atomic Energy Agency (IAEA) and the International Organization for Standardization (ISO)—jointly announced the adoption of a new ionizing radiation warning symbol to supplement the traditional trefoil symbol. The new symbol, to be used on sealed radiation sources, is aimed at alerting anyone, anywhere to the danger of being close to a strong source of ionizing radiation.[12] It depicts, on a red background, a black trefoil with waves of radiation streaming from it, along with a black skull and crossbones, and a running figure with an arrow pointing away from the scene. The radiating trefoil suggests the presence of radiation, while the red background and the skull and crossbones warn of danger. The figure running away from the scene is meant to suggest taking action to avoid the labeled material. The new symbol is not intended to be generally visible, but rather to appear on internal components of devices that house radiation sources so that if anybody attempts to disassemble such devices they will see an explicit warning not to proceed any further.[13][14] * https://en.wikipedia.org/wiki/Hazard_symbol#Ionizing_radiation_symbol https://en.wikipedia.org/wiki/Hazard_symbol#Ionizing_radiati... * https://en.wikipedia.org/wiki/ISO_21482 https://en.wikipedia.org/wiki/ISO_21482