Archaeologists are using computers to rebuild ancient Roman theatres based on their ruins, allowing them to better understand their role in Roman culture. Written, produced and presented by Wilson da Silva. Broadcast in 11 May 2000 on Quantum, ABC TV.

A new birth control vaccine, using genetically engineered organisms, targets common kangaroos; but some scientists fear it could affect endangered species.

Physicists develop technology that can detect parcel bombs made from any explosive by scanning for minute traces of nitrogen. Produced, directed and written by Wilson da Silva. Broadcast on 30 March 2000 on Quantum, ABC TV

Mothers at risk of premature birth are often given cortisol, a stress hormone that matures an infant's lungs. But studies in sheep suggest it may damage the foetal brain. Written and presented by Wilson da Silva and produced by Madeleine O'Dea. Broadcast in 15 October 1998 on Quantum, ABC TV.

For the first time, modern brain imaging techniques are allowing researchers to see – and treat – people suffering from Post-Traumatic Stress Disorder, or PTSD.