Miller and Urey's experiment did not create organic matter in the sense of complex molecules like proteins or DNA. Instead, they created simple organic molecules, which are the building blocks of life.

Here's a breakdown of what they created:

* Amino acids: These are the building blocks of proteins, which are essential for many biological functions.

* Fatty acids: These are components of cell membranes.

* Sugars: These are sources of energy for cells.

* Other simple organic molecules: These include molecules like urea and formic acid.

Importantly, Miller and Urey did not create life in their experiment. They demonstrated that simple organic molecules could be formed under the conditions that were thought to exist on early Earth. This provided strong support for the idea that life could have arisen from non-living matter.

While the experiment was a landmark achievement, it is important to understand that it was only the first step in understanding the origin of life. The formation of complex organic molecules and self-replicating systems from these simple building blocks remains a complex and fascinating area of research.