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SciShow
Where did Teeth Come From??
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...
Curated Video
What Is Dermal & Microdermal Piercing?
Howcast - Learn everything you need to know about dermal piercing and microdermal piercing from professional body piercer Dana Dunn in this Howcast video.
Bozeman Science
Bozeman Science: Plant Nutrition & Transport
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...