A controversial medical trial is taking place in Baltimore, freezing gunshot victims in an attempt to extend "the golden hour', and stop trauma patients from bleeding out. Nicola Twilley has visited the city for the New Yorker to explore the tensions this is creating.

Dr Chris Smith of The Naked Scientists with groundbreaking research that must already be one of the front runners for this year's Ig Nobel science awards. For the first time there is empirical evidence that being good does not in fact increase the likelihood of Father Christmas arriving at your chimney!

Will you ring my bells?! Also walking in the footsteps of ancient man, the truth about electric drills, and could the way you walk be an early warning of cognitive decline?

One of the oldest forms of mass communication, after smoke signals but before Snapchat, was the tradition of ringing church bells to signal what was happening in your neighbourhood. Even with uncapped broadband plans and free wifi, people are still ringing bells here in New Zealand! In fact, the country's featuring on some bellringers' bucket lists, with Dunedin having the southern-most bell tower in the world. We visit the Wellington Combined Society of Bellringers and meet tower captain Derek Williams and the other ringers.

Chris Smith on the amazing discovery of some size-10 footprints in Tanzania. No big deal? Well, these prints date back 3.6 million years and could fundamentally change our thinking about human evolution.

It's the season to be drilling and we're testing electric drills with George Block of consumer.org.nz. So how much do you need to spend to get a decent electric drill? We'll find out which brands get George's tick of approval.

The way you move can say a lot about how your brain is ageing. Rodolfo Savica of the Mayo Clinic recently published a study in the Journal of Alzheimer's Disease linking gait with memory and cognitive decline.

Infomercial products: do they work? Then why seabirds are eating plastic and robotic rubbish rescue offers a new way to clean up our seas. Also drone repellent technology and science news (pandas in peril & detecting prostate cancer).

George Block has been testing the claims of three 'as seen on TV' products offering easier ways to paint your home, water the garden, and chop up your garlic.

Loads of plastic rubbish finds its way into the sea every year and seabirds are hunting it out and eating it, fooled into thinking it's food by the way it smells. Matt Savoca of the University of California Davis was on the team that did the research.