A long time ago, a maid named Hua worked for a very stingy couple. Then one day, a beggar arrived at their door...

Hua and the old beggar cross paths once again.

The stingy couple decide to beautify themselves in the supposed "Fountain of Youth, only to encounter the unexpected.

This video explains why a honeybee dies after stinging someone.

This video explains why we shouldn't eat fruit that has gone bad.

This video explains why picking our noses not only doesn't look nice, but can also be harmful to our health.

This video explains the different circumstances under which hair might fall out.

This video explains how giraffes evolved to have the long necks they have today.

The giraffe's long neck serves many interesting functions.

This video explains why fresh vegetables are important to the body's overall health.

This video explains why a fish's body is covered in mucus.