1) The world's oldest known recipe is for beer and is over 4,000 years old.

2) The Serengeti National Park, located in Tanzania and extending into Kenya, is renowned for its vast savannahs, diverse wildlife, and the annual wildebeest migration. It is a UNESCO World Heritage site and a popular destination for safari enthusiasts and nature lovers.

3) The universe is estimated to be around 13.8 billion years old.

4) The word "country" contains three vowels: O, U, and Y.