Our Changing World for Thursday 7 November 2019

9:06 PM.Victoria University researchers are radio-tracking urban rats in Wellington city suburbs to find out how large their home ranges are, to help improve predator-free trapping efforts. Read more Audio

8:00 AM.The metal tantalum is usually found with the element niobium, has a very high melting point but is a 'conflict mineral', says Prof Allan Blackman in ep 80 of Elemental. Read more Audio

8:00 AM.Technetium was the first element on the periodic table to be synthesised. It is rare, radioactive and has only a few uses, says Prof Allan Blackman in ep 81 of Elemental. Read more Audio