A recent spike in cash in transit heists has us speaking to Dr. Hendrik Lochner from UNISA and Zero Foundation Africa's Benedict Weaver about the tech behind this. In Unscience, find out whether men are more likely to take risks when crossing the road. Later, we question the science behind polygraph or 'lie detection' tests with Niel Visser, Clifton Coetzee from the SA Polygraph Academy, and George Maschke from Antipolygraph.org wits.journalism.co.za