A lack of iodine causes goitre, and seafood and iodised salt are good sources of this important trace element, says Prof Allan Blackman from AUT, in ep 38 of Elemental.

Indium is a very soft metal, and as indium-tin-oxide it is an indispensable part of the swipeability of touchscreens, says Allan Blackman from AUT in ep 37 of Elemental.

A panel of five experts debate what it will take to turn the idea of a predator-free New Zealand by 2050 from a dream into a reality.

A panel discussion on 'Predator Free New Zealand - dream or reality' with five experts in pest biology and large scale eradication porjects.

Hydrogen is the first element on the periodic table. It is the oldest, lightest and most abundant element in the universe, but on earth it is usually found in compounds such as water, says AUT's Allan Blackman, in ep 36 of Elemental.

Holmium has interesting magnetic properties and is an important part of precise surgical lasers known as the 'Swiss Army knife' of lasers, according to Prof Allan Backman from AUT, in ep 35 of Elemental.

Behind-the-scenes at Auckland Zoo with sick kākāpō, and the chemical element holmium.

Kākāpō death toll from aspergillosis rises by one to seven, while nine birds have been given a clean bill of health. Sad and positive news from the frontline of the fight to save kākāpō, in ep 20 of the Kākāpō Files.

Helium is the second most abundant element in the universe and possibly the most unreactive element on the periodic table, says Prof Allan Blackman from AUT, in ep 34 of Elemental.

Hafnium is named after Copenhagen and as it has a very high melting point it was used in the thruster nozzles of the Apollo Lunar modules, according to Elemental's Allan Blackman from AUT.