Mark Hanna

The mysterious case of the $1.50 a year power bill
Could it really cost less than a cup of coffee to power your home for an entire year? Mark Hanna investigates the New Zealand Herald's extraordinary claim.
Could it really cost less than a cup of coffee to power your home for an entire year? Mark Hanna investigates the New Zealand Herald's extraordinary claim.
People keep dying in police pursuits. Despite this repeated cycle of calls for change, has anything actually changed?
In any country, Stuff's news story assessing 'edible sunscreen' would be questionable. In New Zealand, the melanoma capital of the world, it's downright irresponsible, writes Mark Hanna.
We need a new law to plug the big gap in our regulation of health products, argues Mark Hanna
Mark Hanna's greatest passion is debunking bad science. Here, he looks at the New Zealand Beverage Council's recent media campaign claiming soft drinks aren't a big factor in obesity.