Instructional Video4:25
SciShow

Where did Teeth Come From??

12th - Higher Ed
Everywhere in the animal kingdom you can find teeth in all sorts of shapes and sizes, so you probably think you have a pretty good idea where they came from. But in reality, this debate is still a hot one, and it may have something to do...
Instructional Video2:24
Curated Video

What Is Dermal & Microdermal Piercing?

9th - Higher Ed
Howcast - Learn everything you need to know about dermal piercing and microdermal piercing from professional body piercer Dana Dunn in this Howcast video.
Instructional Video
Bozeman Science

Bozeman Science: Plant Nutrition & Transport

9th - 10th
Paul Andersen explains how nutrients and water are transported in plants. He begins with a brief discussion of what nutrients are required by plants and where they get them. He shows you dermal, vascular and ground tissue in monocot and...