1) The blue whale is the largest animal to have ever existed, with an average length of about 82 feet (25 meters).

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

3) Banks play a vital role in the economy by facilitating the flow of funds between savers and borrowers, providing loans, and offering various financial services.

4) The Galapagos Islands, located in the Pacific Ocean off the coast of Ecuador, are renowned for their unique and diverse wildlife, including the Galapagos tortoise, marine iguanas, and Darwin's finches. They played a pivotal role in Charles Darwin's theory of evolution.