1) The world's first paper money was created in China over 1,000 years ago.

2) The tongue of a blue whale is so big that about 50 people could stand on it.

3) The potato is one of the world's most important staple crops and a dietary staple in many cultures. It originated in the Andean region of South America and was introduced to Europe in the 16th century. Potatoes are versatile and can be prepared in numerous ways, such as boiling, baking, frying, and mashing. They are a good source of carbohydrates, vitamins, and minerals, and are used in various dishes, including fries, mashed potatoes, and potato chips.

4) Lightning strikes the Earth about 8 million times a day.