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Arsenic is a well-known killer that was once dubbed 'succession powder'. Join Allan Blackman from AUT in episode 7 of Elemental, a journey through the periodic table.
Arsenic is probably the most well-known poison, and it is associated with equally famous names, from Napoleon Bonaparte (did his arsenic green wallpaper really kill him?) to the famous race horse Phar Lap (was he deliberately poisoned).
Professor Allan Blackman from AUT explores arsenic, and finds out that for a few animals, at least, it may actually be a vital trace element.