Participants of the Krewe of Zulu parade hand out painted coconuts to spectators; a reveller parades through the French Quarter. Photograph: Dan Anderson/EPA

After the feast comes the famine. It’s the day after Mardi Gras in New Orleans and the city is muted. They call it Trash Wednesday, as the move(...)

Santa Claus is coming: With about a billion houses to visit, and the typical distance between neighbouring houses being 10m, it is estimated that Santa will have to travel 10 million kilometres on Christmas Eve

How far must Santa travel on Christmas Eve? At a broad scale, he visits all the continents. In more detail he travels to every country. Zooming in, he(...)

Andy Murray clasps his hands on his way to the net after beating Spain's David Ferrer in their men's singles final at the Sony Open in Florida. Photograph: Andrew Innerarity/Reuters

There are complicated questions and more straightforward questions. The geopolitical significance of whether Kim Jong-un is getting laid too mu(...)