Cities are one of our greatest inventions, they bring us together and drive wealth, but as more of us flock to live and work in them, we need to find ways to make them greener, more sustainable and efficient places to live. Physicist Dr Niraj Lal explores some of the engineering solutions driving change. To see how we’ll keep our growing population moving he visits the construction site of the largest public transport system ever undertaken in Australia and discovers how engineers are finding ways to replace concrete - one of the biggest CO2 emitters in the world - with greener alternatives.
Astrophysicist Professor Tamara Davis explores the impact asteroids have had on our planet and discovers that they may hold the key to one of the greatest scientific mysteries of all - how life began. In the Northern Territory, Tamara sees firsthand the destructive power of an asteroid - the gaping 25km wide Tnorala crater. Keeping an eye on current threats are teams at the Siding Spring Observatory, where Tamara observes one of the thousands of potentially hazardous asteroids rocketing through space. Tamara uncovers the story of Victoria's Murchison meteorite, which contains complex organic compounds that scientists are experimenting with in New Zealand, to determine if a meteorite could have kickstarted life on earth.
Weave a spider web and explore pattern and symmetry along the way. There's numeracy in nature! Step into the wild with Dirtgirl and Costa the Garden Gnome and find that maths is hiding around every corner.
A man recounts his life, from his childhood through his experiences in World War II, and the story of his self-sacrificing mother, who raised him alone.