The spectacle of thousands of soldiers gassed to death in France announced to the world that a new class of weapons had arrived.
Meet the brawny bug with a concoction so caustic it'll make a toad vomit.
With rapid advances in gene editing, states signed up to the Biological and Toxin Weapons Convention need to do more to prevent CRISPR from becoming a dangerous weapon.
The treaty to stop the proliferation of nuclear weapons has been exceptionally successful. Only nine states have them. Now, efforts are underway to completely rid the world of them.
In early December, the nations of the world are poised to take an historic step on nuclear weapons. Yet Australia sticks out like a sore thumb among Asia-Pacific nations in arguing against change.