Before there were GPS apps, we had to actively remember routes and landmarks to move around. How did we do it, and have we lost the skill? Neurogeneticist Dr Azlina Ahmad Annuar shares the science behind spatial awareness, what happens in Alzheimer's patients, and whether there's a difference between the male and female brains when it comes to spatial abilities. Does our over-dependence on Waze affect our brain health in the long run?