1) Mountains are important water sources, as they capture and store precipitation, feeding rivers and supporting ecosystems downstream.

2) The sunflower is not a single flower but a cluster of small flowers arranged in a spiral pattern.

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

4) The concept of compound interest can be attributed to the ancient Babylonians, who used it in their banking practices.