Calcium creates objects that are strong and beautiful, from caves, to teeth and bones, and coral reefs. Find out more in ep 16 of Elemental, with Allan Blackman from AUT.

A second, the basic unit of time, is defined by caesium, which is also useful for dating things. Find out more about caesium's role as a timekeeper, in ep 15 of Elemental with Allan Blackman from AUT.

A second, the basic unit of time, is defined by caesium, which is also useful for dating things. Find out more about caesium's role as a timekeeper, in ep 15 of Elemental with Allan Blackman from AUT.

Biology professor Vic Arcus is trying to tease out how enzymes are able to speed chemical reactions up.

Biology professor Vic Arcus is trying to tease out how enzymes are able to speed chemical reactions up.

Research into how enzymes are able to speed up reactions as much as they do, and the chemical element cadmium.

Research into how enzymes are able to speed up reactions as much as they do, and the chemical element cadmium.

Cadmium has featured in red traffic lights, rechargeable batteries and now has a role in quantum dots, according to Allan Blackman, from AUT, in ep 14 of Elemental.

Cadmium has featured in red traffic lights, rechargeable batteries and now has a role in quantum dots, according to Allan Blackman, from AUT, in ep 14 of Elemental.

The story of bromine is one of the color purple, the Dead Sea and an early poison gas used in the First World War, says Allan Blackman from AUT, in ep 13 of Elemental.