The Catalyst team look at what YouTube can teach us about meteors and how far can sea levels rise? Also how to stay as safe as possible in a house fire.

Tattoos: They are on trend but how easy are they to remove? Moon Mining: Scientists look at ways to mine the moon. Muscle fibre Fishing Line: How fishing line, a hairdryer and an electric drill make artificial muscle fibres.

Could omega 3 supplements reduce aggressive behaviour of inmates?; Antarctica Sea Ice: The sleeping giant of climate change; Dog Optimism: How does your dog view the world? Is it an optimist or pessimist?

Three years after the Fukushima nuclear disaster we explore the hidden impact of radioactive sediments and why do some trauma patients appear to recover from injury but just a few days later develop multiple organ failure?

In the first of a two-part special, reporter Dr. Graham Phillips investigates whether what we feed the bacteria deep inside our gut could be contributing to a whole litany of diseases.

In this two-part Gut Reaction special, reporter Dr. Graham Phillips investigates whether the Western diet could be contributing to a whole litany of diseases by causing an imbalance in the bacteria deep inside our gut.

Inside Australia's long lost World War 1 submarine, the AE2, we reveal her hidden secrets and investigate what scientists are doing to protect her from the ravages of time.

Catalyst investigates two ground breaking treatment procedures for epilepsy; We meet the man who discovered dark energy - Nobel Prize winner Professor Brian Schmidt.

Dr. Jane Goodall entered the forests of Tanzania as a girl with a dream. Twenty years later she left a woman with a mission; Can science help the dead speak? We 'unwrap' a mummy to unveil secrets hidden for thousands of years.

Dr. Graham Phillips delves into the latest research on testosterone, from the womb to old age, it moulds the male body & mind. It is also a hormone of good health during the life of both men & women.

Catalyst investigates how modern agriculture methods, increasing diseases and the impending threat of the deadly varroa mite could destroy the last safe-haven for bees on the planet.

Ground breaking Japanese research reveals clues about future hazards for tsunami-prone countries. How playing outdoors can improve children's health and could the bacteria in our stomach ulcers help cure allergies.

Friendship: From before we can even speak, we seek the companionship of others. But why is this drive so powerful? And how come out of all the people we meet in our lives, we fall in friendship with some and not others?

Global Warming Pause: The big question in climate science - what happened to global warming? Virtual universe - reveals the life of the universe. Green alloys - 'reincarnating' CDs, pushbike and car parts.

Tokyo flood prevention - How does a city of rivers defend itself in during flooding rain? Crying - are tears of joy different from tears of sorrow? Open plan office layout - how the open plan office can affect our health.

What does it mean when the weather report says - winds will be up to 50kph... How much notice should we really take?; With planes and birds sharing our skies, how common are collisions and how can they be avoided.

How Aircraft Electromagnetic Interference (AEI) affects our military aircraft; Detecting Tilapia; the cane toads of our waterways and what makes Lasers so dangerous?

Catalyst investigates the science behind the low carb diet. What are the health benefits and are there any risks? Is it suitable for everyone?

The Catalyst team look at how our genes can affect exercise performance; Come face to face with 120 metre tunnel borers Florence and Elizabeth; And reveal the good news for Coral trout on the Great Barrier Reef.

Could abalone blood be the new treatment for cold sores and herpes?; The inspirational story of 350 year old mathematics problem and how it was solved; Tasmania's Great Poo Hunt - have foxes invaded the island state?

With a soaring population how do we keep our cities liveable? And what will the city of tomorrow look like? Catalyst reporter Anja Taylor investigates some innovative ideas for Australia's future cities.

Reporter Mark Horstman gives up some of his own blood to test specially coated stents that can mimic the blood vessel wall and Dr Jonica Newby is on a mission to find out what's been lurking in the back yard.