Terry Tao. Photograph: Graeme Mitchell/The New York Times

Pick a number; if it is even, divide it by 2; if odd, triple it and add 1. Now repeat the process, each time halving or else tripling and adding 1. He(...)

World Health Organisation (WHO) health emergencies programme director Dr Mike Ryan. File photograph: AFP via Getty Images.

An estimated 750 million, or 10 per cent of the world’s population, have been infected by Covid-19, World Health Organisation (WHO) official Dr Mike R(...)

Prof Terry Tao’s Hamilton lecture will draw on his childhood fascination with astronomy and distances between planets.

Terry Tao is probably the world’s best problem solver in mathematics – the skill that is the essence of this essential creative science. So it’s more(...)

 Great Skua: Illustration Michael Viney

Birds, too, have their bullies, muggers and thieves. Seagulls, some of them, snatch ice-creams and sandwiches from human fingers. I once watched a rav(...)

Prof Mike Zaworotko: “Often we already have the solutions, but they have to be matched with the right problems.”

You work in the field of crystal engineering, what is that? Crystals are solids that have repeating patterns of atoms, molecules or ions in their str(...)

Too often good science is countered by ignorance.  This is evident in the US, where objectivity has become a matter of opinion. The plight of the federal government’s top infectious diseases expert Dr Anthony Fauci is the prime illustration of this. Photograph: Leah Millis/Reuters

These are hard times for experts; notably scientists and doctors who believe data (and their interpretation of it) should be allowed speak for itself (...)

A home-schooled Leaving Cert student is seeking leave to bring a High Court case aimed at requiring the Department of Education to urgently consider h(...)

“Clare Island has been a mirage for the last four months for this coronavirus-confined granny whose solitary confinement meant that all conversations – mainly Gooh-Goohs and Gah-Gahs – with the first grandchild were through a mobile phone screen.” Photograph: Getty Images

It is Mini Madam’s maiden voyage and she is the only one onboard not wearing a mask as the Clew Bay Queen slips out of the little harbour at Roonagh p(...)

Britain’s chancellor of the exchequer Rishi Sunak delivering his summer economic statement in the House of Commons in London on Wednesday. Photograph: AFP via Getty Images

The UK is dealing with similar economic fallout from coronavirus as Ireland, and so the summer statement by chancellor Rishi Sunak is worth studying f(...)

Former Central Bank governor Patrick Honohan: ‘It would be a very big mistake to use the previous crisis as a model for how the public finances should be managed.’ File photograph: Dave Meehan

Former Central Bank governor Patrick Honohan has warned the Government not to turn off the spending tap too early and risk worsening the downturn. He(...)

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