10 random facts

- Avocados are a fruit, not a vegetable. They're technically considered a single-seeded berry, believe it or not.

- The Eiffel Tower can be 15 cm taller during the summer, due to thermal expansion meaning the iron heats up, the particles gain kinetic energy and take up more space.

- Trypophobia is the fear of closely-packed holes. Or more specifically, "an aversion to the sight of irregular patterns or clusters of small holes or bumps." No crumpets for them, then.

- Australia is wider than the moon. The moon sits at 3400km in diameter, while Australia’s diameter from east to west is almost 4000km.

- 'Mellifluous' is a sound that is pleasingly smooth and musical to hear.

- The Spice Girls were originally a band called Touch. "When we first started [with the name Touch], we were pretty bland," Mel C told The Guardian in 2018. "We felt like we had to fit into a mould."

- Human teeth are the only part of the body that cannot heal themselves. Teeth are coated in enamel which is not a living tissue.

- It's illegal to own just one guinea pig in Switzerland. It's considered animal abuse because they're social beings and get lonely.

- The Ancient Romans used to drop a piece of toast into their wine for good health - hence why we 'raise a toast'.

- The heart of a shrimp is located in its head. They also have an open circulatory system, which means they have no arteries and their organs float directly in blood.