The race is on to find the minerals we need to enable the world's transition to clean energy, and vast reserves of those minerals lie untouched at the bottom of the Pacific.
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He's been called Australia's Elon Musk. This is his 'trillion-dollar' plan
He has the chic of a Silicon Valley tech bro and a clean energy pitch for investors, but will Gerard Barron's deep-sea mining dream do more harm than good?
Kilometres below the waves, a global fight is brewing
A push to extract minerals from the depths of the Pacific Ocean is gaining momentum. Here is how it works and why it has become a global flashpoint.
He's at the centre of a major fraud investigation. We tracked him down in an elevator
David McWilliams took millions of dollars from investors by saying he was building houses for people with profound disabilities. Despite having his assets frozen, Four Corners can reveal he is still living a lavish lifestyle.
A thousand new homes sit empty across the country. No-one wants to move in
It is a federal housing scheme designed to transform the lives of the profoundly disabled. But a Four Corners investigation has found more than 1,000 of these purpose-built homes are sitting empty.
The growing movement challenging the authority of courts, councils and cops
A growing coalition of groups who reject the legitimacy of governments and courts are engaged in what some call a "quasi-civil war".
Barrister charged $5k-an-hour for class action that got workers as little as $10k
They are meant to deliver justice for ordinary Australians, but class actions are being used by law firms to profit at the expense of some of the most vulnerable members of society.
'Sustained arrogance': More patients of 'spinal wizard' Greg Malham speak out
Former patients and colleagues of Greg Malham have contacted Four Corners to describe their own dealings with the neurosurgeon and what they say was inappropriate care and follow-up.
ATO reviewing how it decided to waive $950k owed by former PM's company
The tax office has moved to allay fears powerful individuals are given special treatment, saying it will review how it made a decision to wipe penalties and interest from a company owned by Paul Keating.
How the ATO failed to stop a $2b scam so simple you could do it on your phone
It was a scam so simple it took just minutes on your phone, where you could tell the tax office how much money to pay you, and it came through within days.
ATO reverses decision to bill ex-PM's company $950k
The unusual decision, which came after years of negotiations, provides a rare glimpse into the ATO's inner workings when overturning its own decisions on tax debt.