When you think of surfactants, you might think of soaps, detergents and other man-made chemicals. But it turns out that some other animals utilize their own versions of these sudsy molecules.

Women shave their legs an average of eleven times a month, so you might as well learn to perfect your technique.

Sing along with a fun song to the tune of Happy Birthday as you learn the best way to wash your hands. Full hand washing song lyrics are on screen during the video and below. After the song, we cover a step by step guide for...

This explains structure and properties of water including hardness of water and methods of removing the hardness.

In this video learn about hard and soft water, the differences between these and where to find examples in everyday life.