A look back at some of the most memorable moments of the Rio 2016 Olympic Games.
Host Kylie Gillies recaps a day of Olympic competition that included plenty of Australians and gold medal moments.
Michael Mosley tests how hard you really need to exercise to improve your health. Alain Gregoire cures his lifelong phobia of heights in just two hours using virtual reality. Meanwhile, Zoe Williams investigates a hidden illness that can cause stillbirth, and Giles Yeo tests the extraordinary claim that eating less can boost your memory, and whether hot drinks or cold are best to cool you down.
When a new, deadly virus spreads across North America at an alarming rate, one man is singled out for bringing the disease to the country.