Catalyst

Could our food be making us sick - very sick? In the first of a two-part special, Dr Graham Phillips reveals research about the interplay between food and the bacteria deep within our guts.

Will we soon find evidence of alien life? Scientists are currently in the throes of an unprecedented search for ET - and an answer to this long-pondered question may come sooner than you think.

Garry has tried to lose weight, but could his gut bacteria be keeping him fat? Nutrition scientist Dr Joanna McMillan explores controversial science suggesting gut bacteria might be affecting our appetites and mood.

Nutritionist Dr Joanna McMillan is on a mission to help stem the onslaught of Type 2 diabetes, devising a personalised program to help four Australians on the brink of developing the chronic illness.

Intermittent fasting is growing in popularity, and aside from weight loss, there are claims it can improve our health. Dietician Dr Joanna McMillan tracks 5 people fasting to understand the benefits and impacts on our bodies.

Celebrate the science of beer with chef Paul West, as three teams of budding brewmasters take on the challenge to make their best homebrew. But do they have what it takes to impress our panel of international judges?

Australians spend over a billion dollars on injectable treatments annually and clients seeking "tweakments" are getting younger. We explore the psychology behind this trend and the consequences of pursuing perfection.