Data Science, Machine Learning, and Python

One of the reasons I decided to learn data science is the power of the word Machine Learning. When I started my research on what type of data science/software engineering course I should take, I encountered many cases where data science and machine learning were thrown together. This gave me a question "Why do websites use them together so often, and how similar are those two fields?" I mean, it was evident that those two were related in some part, but as a new kid on the block who just started to get interested in data science, it took a while for me to understand the difference between the two. So what is the difference?