How Are Animal and Plant Cells Different?

Scales range from simple machines that weigh your produce to precision instruments that measure anything from molecules to massive cargo -- but they all work on related principles. Learn how different types of scales work in this episode of BrainStuff, based on this article: http ...  Show more

In South Carolina, the first school for formerly enslaved people during the Civil War shifted to become a center for social activism during the Civil Rights movement, and stands today as a landmark of African American culture and history. Learn more about the Penn Center in this ...  Show more

Pigs, hogs, boars and javelinas. What's the difference? Tune in to find out.

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As part of a massive new global tracking project, scientists are monitoring animals from a receiver on the International Space Station, mapping the incredible, previously unknown journeys that animals undertake. They’re beginning to tackle questions like how far do animals actual ...  Show more

Even though giraffes are one of the most recognizable animals on the planet, it wasn't until the 21st century that biology really set about studying them. They've found giraffes are even more amazing than they appear.

What's the smallest piece of matter? Is there one? 

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