Artificial Intelligence 

is the broader concept of creating intelligent agents, or systems that can reason, learn, and act autonomously.
It encompasses a wide range of techniques and approaches, from rule-based systems to machine learning. Think of AI as the overarching goal of creating intelligent machines.

Machine Learning

is a subset of AI that focuses on developing algorithms that allow computers to learn from and make predictions or decisions based on data.It's about teaching computers to identify patterns without being explicitly programmed.

To summarize:

AI: is the big picture: creating intelligent machines.
ML: is a tool within AI: for teaching machines to learn from data.