1) The Berlin Conference in 1884-1885 divided Africa among European powers and set the stage for the colonization of the continent.

2) The world's longest traffic jam occurred in China in 2010 and lasted for 12 days, stretching over 60 miles (97 km).

3) The world's first credit card was introduced in 1950 by Diners Club.

4) 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.