1) The word "cheese" contains three vowels: E, E, and E.

2) The fingerprints of koalas are so similar to humans that they have been mistaken at crime scenes.

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

4) The development of voice recognition technology has led to the widespread use of virtual assistants such as Siri, Alexa, and Google Assistant.