Beyond the answers - interesting background to this quiz

A dance that crossed an ocean

The bolero began in Cuba in the late 18th century, danced in 3/4 time with a distinctive rhythm tapped out on castanets or drums. It travelled to Spain, where composers turned it into a concert form - Ravel's Bolero, written in 1928, is the most famous example, though it is a very different creature from the Cuban original. The dance also took root across Latin America, proving how easily music crosses borders.

The musical that made a megastar

Andrew Lloyd Webber wrote the music for Evita, which opened in London in 1978 with lyrics by Tim Rice. The show follows Eva Peron from her poor childhood to the office of First Lady of Argentina, and it gave Elaine Paige her breakthrough role. Its most famous song, Don't Cry for Me Argentina, became a global hit and helped turn the musical into a lasting phenomenon.

The year that changed Russia

The Russian Revolution took place in 1917, and it actually came in two stages: the February Revolution, which toppled the tsar, and the October Revolution, which brought the Bolsheviks to power under Lenin. The events of that year ended centuries of Romanov rule and led to the creation of the Soviet Union. It remains one of the most consequential political upheavals of the 20th century.

A blood vessel with a one-way job

Arteries carry blood away from the heart, while veins bring it back. This seems simple, but it matters: arteries must withstand high pressure, so their walls are thicker and more elastic than those of veins. The pulmonary artery is a useful exception to remember - it is the one artery that carries deoxygenated blood, from the heart to the lungs.

Why tungsten hides behind a W

Tungsten's chemical symbol is W, from the German word Wolfram, which is still the element's name in many European languages. The English word comes from the Swedish tung sten, meaning "heavy stone" - a fitting name for a metal with one of the highest melting points of any element. Its symbol is a reminder that chemistry's vocabulary often preserves older, national names.