Where do emotions come from? This is a question that has interested scientists for centuries. Most of us would agree that when we experience an emotion, there is often a change in our body. We might be aware of our heart beating very fast when watching a scary film, or notice breathing heavily after a big argument.
As far back as the 1880s, it was theorised that physical changes in the body - such as a racing heart beat - would be sufficient to trigger an emotional experience. Though over the past 150 years, this has been hotly debated.
