Immediately after the terror attack on a Moscow concert hall which left 137 people dead at the weekend, the Russian president Vladimir Putin was quick to point the finger of blame at Ukraine. But it has since emerged that the attackers were in fact fighters from Isis-K, the same group that perpetrated a murderous attack on Kabul airport days after the Taliban took power in Afghanistan.

It has also emerged that, at the beginning of March the US issued a warning based on CIA intelligence, both to its own citizens in Russia and privately to the Russian authorities, of an imminent terror threat targeting mass gatherings such as concerts. In the event Russia’s security services were unable to prevent the atrocity. Robert M Dover, an expert in the workings of intelligence services, explains why the CIA’s warning may have fallen on deaf ears.

We also found out what students learned on a university course about happiness – and whether it made them any happier. And for history buffs, the story of the Northamptonshire manor house where Henry VIII’s grandmother Margaret Beaufort plotted the rise of the Tudor dynasty.

Plus, if you take a look at our homepage today, you might notice some changes. The new design should help us better showcase the breadth of articles we produce each day.

Rachael Jolley

International Affairs Editor

Mourners stand in a queue to lay flowers at a makeshift memorial in front of the Crocus City Hall in Krasnogorsk, after 130 were killed in a terrorist attack. Nikolay Vinokurov/Alamy

Moscow attacks: why the Kremlin may have ignored any terrorist warnings from the CIA

Robert M. Dover, University of Hull

The US said it shared information about a potential attack weeks before the Crocus City massacre.

PeopleImages.com - Yuri A/Shutterstock

What we learned from teaching a course on the science of happiness

Sarah Jelbert, University of Bristol; Bruce Hood, University of Bristol

We followed up students years after they took our course to find out whether they still reported better wellbeing.

Portrait of Lady Margaret Beaufort by Meynart Weywyck (circa 1510). National Portrait Gallery

How Henry VIII’s grandmother used a palace in Northamptonshire to build the mighty Tudor dynasty

Rachel Delman, University of Oxford; Keely Hayes-Davies, University of York

Beaufort’s presence at Collyweston formed part of a strategic plan, devised by mother and son, to exert royal influence both locally and nationally.

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  • How nature can alter our sense of time

    Ruth Ogden, Liverpool John Moores University; Jessica Thompson, University of Salford

    Time pressure is bad for your health- but the answer may be right outside your door.

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