1) A single bolt of lightning can heat the surrounding air to temperatures five times hotter than the surface of the sun.

2) The concept of reinsurance, which is insurance for insurance companies, originated in the 17th century.

3) Bats are the only mammals capable of sustained flight.

4) The Victoria Falls, situated on the Zambezi River between Zambia and Zimbabwe, is one of the largest and most spectacular waterfalls in the world. It is over 1.7 kilometers (1 mile) wide and has a height of 108 meters (354 feet), attracting visitors with its breathtaking beauty and power.