Proving microscopic structures exist is a difficult task. Learn how scientists did just that in the mid-1800s as they set out to identify the cellular structures related to genetics. The online lesson explains the collection of work that...

Mario Capecchi requested funding for a new procedure targeting genes and was rejected. Four years later, after he proved it worked, the NIH apologized and funded his research. Use an online interactive to learn about his research and the...

This tutorial will show you how to get started making a card game in Director using the Lingo programming language. You will also get some experience with objects, behaviors, and other Director basics by downloading the free source code...