The real name for a hashtag is an octothorpe. The 'octo' refers to the eight points in the symbol, but according to the Merriam-Webster dictionary the 'thorpe' part is a mystery.

Farm-raised salmon is actually grey, due to having a different diet to wild salmon. Fish farmers dye salmon red to make them look more natural.

Members of Southeast Asia's Bajau tribe can hold their breath underwater for up to 13 minutes. Their sea-faring lifestyle has led to the evolution of spleens up to 50% larger than average, enhancing their bodies' oxygenation.

At one point in Earth's history, it rained for over a million years straight, caused by intense volcanic activity and atmospheric changes.

The phrase 'running amok' originates from the Malay word 'mengamok,' meaning to make a furious and desperate charge. Captain Cook used it to describe the behaviour of Malay tribesmen.

The first recorded use of 'OMG' as an acronym for 'Oh My God' appears in a 1917 letter from British Admiral John Arbuthnot Fisher to Winston Churchill.

Stomach acid is capable of dissolving materials like metal and bone. However, a thick mucus layer protects the stomach lining, preventing acid damage.