Overview: The Smack To smack or not to smack, it’s an issue that goes right to the heart of parenting. And there doesn’t seem to be any middle ground – you either believe that smacking is good old fashioned discipline or you consider it a form of child abuse. Dozens of countries around the world have banned it. Now there’s a big push to do the same here. That’s despite the fact that most Australians think that an occasional slap is OK. Still, very few will admit to it, let alone smack their kids in public, like one mother you’ll meet on Sunday night. Reporter: Michael Usher Packer’s Punt The Packers know a thing or two about business, so when they talk we tend to listen. Now, James Packer wants to talk about tourism but in typical billionaire style it’s a blunt message; The industry has seen much sunnier days. The big question then is how do we fix it? Packer says by getting Asia, and especially China, to visit us. And forget cuddly koalas and shrimps on the barbie, give them gambling. Of course, Packer would say that, he’s our biggest casino operator but he’s also promising that if we follow his plan, all of Australia will win. Reporter: Karl Stefanovic The Big Bang Theory Have you ever wondered how it all began? Humankind has been pondering that question since the moment we first gazed up at the stars. Now a million or so years later, a team of scientists in Europe is on the verge of unlocking the secret of the big bang, that explosive split-second when our universe was created. The scale of this experiment in a bunker deep beneath the Swiss Alps is, frankly, mind-blowing. It’s the largest engineering project since man went to the moon and, if it works, we may finally get an answer to the most baffling mystery of all. Reporter: Liam Bartlett