Nato’s response to the Skripal poisoning has revealed its disunity

The 1p piece is useless, but it is less than half a century since it was bright and new

A Milan exhibition shows how much Dürer was influenced by the Italian masters

Animal welfare is a political open goal — and Brexit is a one-off chance to establish better standards in the UK

The Monty Hall problem requires clear, unbiased thinking as new information comes in

Get a gallery to yourself in Paris: pick an unfashionable country or a passed-over period

There is a rare breed who go to Germany in February: we love to overheat in flagstoned, candle-lit Weinstuben, and freeze in baroque churches and sudden blizzards

Although nature is not built for man, the pleasures it affords are instinctive and infinite. The beauty of the natural world transcends that of any urban space

Sexual harassment is happening in schools and universities across the country. With all our concern about victims of the past, let’s not overlook the present