Where Did That Curly Hair Come From?

Where does the mass for a growing tree come from? Scholars consider a few different hypotheses and guess which is correct. They then analyze data from different experiments to understand which concepts science supports.

In this age of globalization, the foods we eat often come from countries scattered all around the world. This research-based lesson asks young scholars to pick two of their favorite food items and investigate the origins of their...

Gold comes from rocks, but rocks can't produce gold—so where does it really come from? The video presents two competing theories of where gold comes from and how it is produced. 

When did things start going viral? Travel back through eons of history and learn about the origins of viruses. Part of a larger series, the lesson discusses what scientists already know and how they study viruses. The video also details...

Part of a biology playlist, the video discusses human ancestry and represents the first in a smaller four-part series exploring humans. It describes the fossils found, where the fit on the family tree, and why there are so many missing...

From stately oaks to towering pines, trees are the largest members of the plant kingdom that most people see. But how do trees get so big? Find out where the mass of a tree comes from with a short video. The narrator presents the topic...

From Boston to Bora Bora, humans have the same facial expressions to convey grief, surprise, and disgust. How did we all end up on the same page emotionally? Explore innate and learned expressions in the 133rd video in a 143-part series....

It's commonly known that over 70 percent of of the earth's surface is covered by water, but exactly where did it all come from? Join this short video as it travels back to the beginning of the universe in search of the origins of this...

No, you didn't get your genes from the local clothing store. Learn where they really come from by watching this video as it explores how the genes found in all plants and animals today have arisen over billions of years of mutations from...

Do you or your learners know where apples or potato chips come from? If not, you will after this lesson. To explore careers in agriculture, learners first examine the importance of agriculture to our nation. They view several movies...