1) The world's tallest waterfall is Angel Falls in Venezuela, with a height of about 3,212 feet (979 meters).

2) The world's oldest university, Al-Qarawiyyin, was founded in 859 AD and is located in Fez, Morocco.

3) A newborn kangaroo is about 1 inch (2.5 centimeters) long and weighs less than a gram.

4) The Great Barrier Reef, situated off the coast of Queensland, Australia, is the largest coral reef system in the world. It stretches over 2,300 kilometers (1,400 miles) and is home to a diverse array of marine life, making it a popular destination for diving and snorkeling.