Stephen Moulton Babcock was a very smart man who lived a long time ago and did a lot of important things for the world of science. He was born in 1843 in New York, and when he grew up he studied really hard to learn about things like chemistry and biology.
One of the big things that Stephen Babcock did was figure out a way to measure how much butterfat was in cow's milk. This was really important because people wanted to buy good quality milk and butter, but it was hard to tell which cows were making the best milk. Stephen figured out a special test that could measure the amount of butterfat in the milk, and this helped farmers know which cows were making the best milk and which ones needed some help.
Stephen also did a lot of work studying how different foods and nutrients can affect your body. He found out that different kinds of proteins were really important for your health, and he even helped develop a special kind of milk that was really good for babies who couldn't drink regular cow's milk.
Overall, Stephen Babcock was a really smart and important scientist who helped improve the way we understand and use food today.