The restart of a North Korean nuclear facility has sent shockwave around the world. Why is it happening now?
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Estimates of how much of Iran's frozen assets it will get once sanctions are lifted vary widely, but the sum is most likely just a fraction of the total.
Critics of the nuclear deal with Iran have good reasons to be skeptical, but blocking the deal would make the United States and its allies less secure.
Possession of a nuclear deterrent has helped prevent recurrent conflict between South Asia's two warring powers.
Any nuclear weapon exchange or major nuclear plant meltdown will immediately lead to a global public health emergency. What can we learn from past events to help prepare?
The average age of survivors is now 80. In five years, very few of these first-hand witnesses will be around to remember the event. Many of their stories are in danger of being lost forever.
John Hersey's article Hiroshima (1946) is seminal in historical and literary terms: the shocking realities of the atomic bomb demanded a new way of writing.
Today's nuclear arsenals are so powerful that dropping a Hiroshima-size bomb every two hours for 70 years would not exhaust their destructive capacity. The global disarmament regime is broken.
The way we judge nuclear risk isn't just a rational calculation – it's a reflection of much deeper biases.
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?
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.
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.
Iran's path back to nuclear acceptability is now set out. Let the real work begin.
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.
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?
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.
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.
Kontributor teratas
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Honorary Principal Fellow, School of Population and Global Health, University of Melbourne
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Lecturer in International Relations, Department of Politics and Philosophy, La Trobe University
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Reader in International Relations, Aston University
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Senior Lecturer (International Security), University of York
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Reader in International Security, King's College London
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Senior Lecturer in International Politics, University of Leicester
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Director of the Health Physics and Radiation Protection Graduate Program and Professor of Radiation Medicine, Georgetown University
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Associate Professor of the Practice of International Relations, USC Dornsife College of Letters, Arts and Sciences
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Associate Professor of Physics, University of Melbourne
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Simons Chair in Disarmament, Global and Human Security at the Liu Institute for Global Issues, University of British Columbia
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Stanton Nuclear Security Fellow at the Belfer Center, Harvard Kennedy School
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Professor of International Politics, University of Birmingham
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Visiting Research Fellow, School of Geography, University of Leeds
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Researcher in Security and Defence, the Policy Institute at King's, King's College London
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Lecturer in Political and Cultural Geographies, Manchester Metropolitan University
