Back in 2001, Australia was under threat from one of the world's most intractable invaders – the imported red fire ant.
A special edition of Catalyst investigates fire, flood and acid mud in the Murray Darling Basin.
Experts are warning that Australia is in the grip of the worst drought ever. Without rain, dams supplying our thirsty cities will run dry in just a few years – maybe sooner.
Surprisingly little is known about gold nuggets. How do they form, where do they come from and do they hold clues to finding more gold?
Studies from the Northern Hemisphere show that you can keep the cold out and the heat in by adding a green roof to a building. But in warmer climates vegetation can also cool a building down.
When it comes to water these days every drop counts. Australians have a higher water use per capita than any other country in the world.
Sex is a very complicated affair - at least it is to a lizard in a cold climate. It's long been known that for some reptiles the incubation temperature of their eggs can determine their gender.
Farmer and horse-breeder Peter Andrews has been described as everything from a crackpot to a visionary.
There's no doubt that one of Australia's greatest economic resources is mineral ores.
China is gearing up for the fastest deployment of nuclear energy in history, fuelled by Australian uranium. At least thirty new reactors are planned to be built in the fifteen years.
Catalyst's resident Palaeontologist, Dr Paul Willis, has been a fossil lover for as long as he can remember.
What would happen if the world were to start running out of oil?
You'd think after thousands of years perfecting the art of riding horses, everything there was to know about horses would already be known.
If you thought the pollution in our cities was bad, may be you should consider the air you're breathing indoors.
While solar power is clean and green, the great drawback for it has always been cost: it is more expensive than coal or gas-generated electricity. But could that finally be about to change?
There's been a lot of talk about a nuclear future for Australia. But we already have an enormous nuclear reactor providing us with massive quantities of energy – the sun.
Space is once again 'the new frontier' – this time in finding a solution to the Earth's energy woes.
For two decades, the CSIRO's Research Vessel, The Southern Surveyor, has been helping Australian scientists learn more about the oceans surrounding our island nation.
Catalyst's own surfing scientist, Ruben Meerman, heads to Queensland's Sunshine Coast to look at the science of the beach.
The Perfect Wave
In May 2007, the Mayor of London laid down a gauntlet: 60% cuts in carbon emissions by 2025 – that's 25 years ahead of the UK's national target – 25 years ahead of anywhere else in the world.