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Articles on United States

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International scientific collaboration has boomed since the end of the 20th century. Yuichiro Chino/Moment via Getty Images

It’s getting harder for scientists to collaborate across borders – that’s bad when the world faces global problems like pandemics and climate change

Scientific research done through international collaboration has boomed in the past 30 years. But recently, powerful countries are using science as a tool of politics, threatening that work.
A military officer salutes during a parade to commemorate the anniversary of the founding of Communist China in Beijing. Mark Schiefelbein/AP

Friday essay: if growing US-China rivalry leads to ‘the worst war ever’, what should Australia do?

Hugh White warns of a potential war between the US and China, drawing lessons from the first and second world wars to explore how Australia might respond to such a conflict – and where to draw a line.
A U.S. Air Force jet performs a test drop of a B61-12 bomb in December 2021. That bomb can contain a nuclear warhead for use in wartime. Los Alamos National Laboratory

What countries have nuclear weapons, and where are they?

Both the Russian and US arsenals boast thousands of nuclear weapons, located in various places around their own countries and, for the US, in Europe as well.

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