Chris and Xand Van Tulleken endure a month long high-fat and high-sugar diets to try and dsicver where sugar or fat is worse for us.

Jeff Bush was asleep at his home in Florida when a sinkhole opened up beneath his bedroom. He was never seen alive again and his body was not recovered. Iain Stewart travels to the American state to try and find out what took Jeff's life and he investigates why the geology of the area makes it the sinkhole capital of the world.

The show goes behind the scenes at Nasa to find out how the space agency is getting ready for its most ambitious and daring mission yet which is to land a manned craft on the surface of Mars.

Placebos come in all shapes and sizes but they contain no active ingredient. The show takes a look at the reasons why they work, and explains how we could all benefit from the hidden power of the placebo.

Daniel Kahneman takes a look at conflict as you make decisions that affects every aspect of life from diet to what money is spent on.

The show takes a look at how a lifetime of study by psychologist Uta Frith has managed to transform the understanding of autism.

The show launches the multi-million pound Longitude Prize 2014 which is developed by Nesta to encourage inventors and scientists to find solutions to a new scientific challenge. The winner will be chosen by the public.

The show takes a look at the search for Malaysia Airlines Flight MH 370, which disappeared on March 8 whilst travelling from Kuala Lumpur to Beijing.

Dr Helen Czerski and John Hammond explore what the bizarre weather the UK is experiencing means for the future of our weather systems. They also look at the one thing that connects all of the extreme weather we have experienced across the country.

Michael Mosley takes a look whether summer barbecue favourites such as burgers and sausages are as bad as some people believe.

Michael Mosley looks at the effect mass meat production is having on the planet and explores whether free-range products are truly better value for money, rather then factory farmed meat.

The show follows why some people are plagued by allergies, whilst others aren't and how it may be down to the Westernised culture.

Julian Assange and Tim Berners-Lee feature in a film all about hacking into the internet and the global worry that the internet has been set up by the government to watch our every move.

The Ebola virus is one of the most virulent infections currently around and the show takes a look at the search for a cure.

Michael Mosley and Alice Roberts take a look at new research that claims the connections in men's and women's brains follow different patterns, which could help to explain typical forms of gender-specific behaviour.