This episode will help you answer the question, “How do we know all living things are made of cells?”--an introduction to the three parts of cell theory, and the historical development of this essential theory for understanding biology!

Remember, “smart” is something we *become* as we learn new things. So, keep listening, keep learning, and keep getting smarter every day!

This episode is part of a series all about understanding the nature of life—the characteristics of living things, how we classify life, and even where life comes from. Each season has a different thematic focus, so if you found this episode interesting or helpful, check out the rest of the episodes in this season! Instructional resources for this episode, including the script, a thinksheet, and alignment with the Next Generation Science Standards can be accessed for free at https://goodtobesmart.com

It’s Good to Be Smart! is created by Dr. Dave Mulder with support from the National Science Foundation through a grant from the Robert Noyce Teacher Scholarship Program. This material is based upon work supported by the National Science Foundation under Grant No. (DUE-2243334). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.