US Dept of Energy, via Wikimedia Commons
The way we judge nuclear risk isn't just a rational calculation – it's a reflection of much deeper biases.
Brazil’s former president, Jose Sarney.
EPA/Fernando Bizzerra Jr
Latin America's two biggest players spent much of the 1980s in a low-grade arms race – and they both had nuclear aspirations. How did they manage to diffuse the tension?
Blowing up the desert – and people’s minds: the first atom bomb test in 1945.
The first atom bomb test seventy years ago today marks the start of a change in Americans' thinking about radiation. On balance, our nuclear anxieties endure today.
Increased oil and gas revenues amid lifted sanctions are set to raise Iran’s economic fortunes, which ease Middle Eastern tensions.
EPA/Abedin Taherkenareh/AAP Image
Opponents of the Iran nuclear deal say it raises the nuclear weapons threat in the region. But Middle East tensions are actually likely to ease as Iran grows richer without being shackled by sanctions.
As it moved from the edge of the global order to the top of the heap, China realised it needed a nuclear arsenal to be taken seriously.
Taking a look at Iran’s Bushehr nuclear plant.
Iran's path back to nuclear acceptability is now set out. Let the real work begin.
Walking in sync.
A scholars' panel looks at the diplomacy, the science and the pragmatism behind the Joint Comprehensive Plan of Action signed between Iran and six world powers.
Merrily we roll along.
ru:Участник:Digr via Wikimedia Commons
Fears that nuclear weapons would pop up all over the world post-1945 have proven to be overblown.
So there's now a real plan to sort out Iran's nuclear programme. What about all its other problems?
Britain’s nuclear deterrent is attached to four Vanguard-class submarines.
Splits over Trident can create stalemate between the UK's forces, but the public needs to debate renewing the deterrent before time runs out.
The structures in place to prosecute and protect military whistleblowers are outdated Cold War relics – and we don't even know how they're being used.
The Fukushima disaster was a dark chapter for nuclear power - but high-profile accidents are far from the only downside.
Is nuclear power worth it? No, says Mark Diesendorf – it's never been a major world energy force, it has caused huge accidents, and its greenhouse emissions are higher than many people realise.
A submarine missile-launching capacity brings the threat closer to the shores of the target country.
North Korea does not yet have the capacity to launch a nuclear missile from a submarine. Its recent test, however, suggests it is making progress to a game-changing second-strike capability.
A nuclear-capable Pakistani missile during testing in 2011. The international community hopes other aspiring nuclear nations can develop nuclear power without the military muscle.
Through history, nuclear power has gone hand in hand with the nuclear arms race. But does it have to be this way? Closer international cooperation can help nations embrace nuclear power peacefully.
Foreign ministers Julie Bishop and Mohammad Zarif demonstrated a growing rapport between Australia and Iran in reaching agreement on some but not all fronts during her visit to Tehran.
Australia made progress on restoring trade and sharing intelligence on Islamic State in Iraq. Iran was less open to accepting the return of asylum seekers, which may prove a blessing in disguise.
A big decision looms.
Ministry of Defence
The future of four submarines has become the spat-of-the-day in election 2015.
Iran has never backed out of the nuclear nonproliferation regime in principle. But what about those who never signed up in the first place?
U.S. Secretary of State John Kerry (L) holds a meeting with Iran’s Foreign Minister Javad Zarif ® over Iran’s nuclear program in Lausanne on March 17, 2015.
The US is just one actor in an important global non-proliferation regime that works towards preventing the spread of nuclear weapons.
The Trident-class nuclear submarine Vanguard. The Scottish National Party want the weapons system to be scrapped.
Nicola Sturgeon has set out her Scottish National Party's opposition to renewing Britain's nuclear deterrent. Will it cost that much?
Ready to settle?
Iran is being pushed to the edge by sanctions over its nuclear programme. Will its dying Supreme Leader cave to the pressure?