The legendary traffic lights in Berlin, the “Ampelmännchen”, symbolise the opposite biological functions of chromium compounds in two major oxidation states: one for health and the other for disease. In other words, green stands for “go and safe”, red stands for “stop and danger”.

Seaweed exists in oceans all over the world, and there are many possibilities for using it in both the kitchen and in the food industry. However, since we don’t know enough about how to make seaweed taste good, we rarely eat it. Here, three scientists present how seaweed can be used.