Scientific Theory — Definition & Examples

You are a "Tear Scientist" - your mission is to figure out why people cry! The first experiment you carry out is to observe a bunch of people when they're sad, and see what effect crying has on them. Over the first seven days of the study, these are your observations:

After sad people cry, they feel much better than they do when they don't cry. Based on this observation, you come up with the following hypothesis:

Crying releases pain-relieving hormones, also known as endorphins.