Beyond the answers - interesting background to this quiz

The surprising speed of dolphins in the open ocean

Dolphins are not just playful acrobats; they are built for efficient, high-speed movement through water. Their streamlined bodies reduce drag, while their powerful tail flukes provide strong propulsion. Some species can sustain impressive speeds over long distances, which helps them hunt fast-moving prey like fish and squid. Unlike most fish, dolphins are mammals, so they must surface regularly to breathe, yet they manage to combine this need with remarkable agility beneath the waves.

Two mountain chains that shaped the United States

The Rocky Mountains and the Appalachian Mountains form two of the most significant geographical features in the United States, but they are very different in age and character. The Appalachians are far older, worn down over hundreds of millions of years into softer, forested ridges. The Rockies are geologically younger, with sharper peaks and higher elevations. Between them lie vast plains, and together these ranges have influenced settlement patterns, climate, and transport routes across North America.

John McEnroe and the art of the tennis tantrum

John McEnroe became one of the most recognisable figures in tennis not only for his skill but for his fiery on-court behaviour. A seven-time Grand Slam singles champion, he was equally famous for arguing with umpires and delivering outbursts that became part of tennis folklore. His intensity polarised audiences, but it also reflected a deep competitiveness that made him one of the best players of his era. McEnroe later became a respected commentator, offering sharp analysis of the modern game.

Voltaire and the enduring bite of Candide

Published in 1759, Candide is one of the most famous satirical works in Western literature. Voltaire wrote it partly as a response to philosophical optimism, the idea that this is the best of all possible worlds. Through a series of absurd disasters and misfortunes, the novel mocks that notion with sharp wit and dark humour. Its fast pace and exaggerated style helped make it a bestseller in its time, and it remains widely read today as a classic of Enlightenment thought.