What are LEDs and why are blue ones so cool? Geologists weigh in and say that mysterious shapes in ancient rock were not once alive and reducing fishing helps to keep the reef healthy.

What are the barriers for women in having a long career in science? One study finds that discrimination doesn't occur at the hiring stage. Why was the World War l known as the chemists war? Stu talks about the use of poison gas during the war and we chat to Dr Alice Gorman about space archeology and the democratic process of crowdsourcing names for our solar system.

Lost in Science tells all about nitrogen, wonders if the universe really has been here forever and learns the language of bats and cats.

We meet some funny scientists with a show in the Melbourne comedy festival, come to a consensus over new research about... consensus, and talk to a Microbiologist about microbes.