Instructional Video9:43
PBS

Something Has Been Making This Mark For 500 Million Years

12th - Higher Ed
Paleodictyon, a hexagonal-patterned fossil, is a bit of a mystery. We don’t even know if it’s a trace fossil, or the organism itself. So… what could it be?
Instructional Video8:45
SciShow

How Giant Creatures Eat Tiny Meals: 5 Fabulous Filter Feeders

12th - Higher Ed
Some of the largest creatures that have ever lived on earth thrive by eating tiny prey. Why don’t they eat bigger fish, and how can they even consume these things they can barely see? Here are 5 creatures that grow to be giants by eating...
Instructional Video8:55
SciShow

How Giant Creatures Eat Tiny Meals: 5 Fabulous Filter Feeders

12th - Higher Ed
Some of the largest creatures that have ever lived on earth thrive by eating tiny prey. Why don’t they eat bigger fish, and how can they even consume these things they can barely see? Here are 5 creatures that grow to be giants by eating...
Instructional Video5:23
SciShow

The Oldest DNA Ever Found

12th - Higher Ed
Researchers mapped the mammoth family tree by extracting DNA from fossils. Also, scientists found some sessile animals living under Antarctica's ice shelf, and they're really cool.
Instructional Video2:40
SciShow

Carnivorous Sponges — So That's a Thing

12th - Higher Ed
There aren't many creatures as safe and chill as the humble sea sponge, right? Well, not so fast! It turns out there's a whole family of carnivorous sponges that trap and eat small animals using spines and migrating stomaches!
Instructional Video5:03
Bizarre Beasts

This Creature Is Older Than The Concept of Blood

Pre-K - Higher Ed
Welcome back to Bizarre Beasts: Season Zero, where we are remastering episodes of Bizarre Beasts that were originally created for Vlogbrothers. This episode, Feather Stars! The ancient sea creature that has been on this planet for 500...
Instructional Video6:52
Professor Dave Explains

Phylum Hemichordata: Acorn Worms

9th - Higher Ed
To get started with Deuterostomia, we will look at phylum Hemichordata. These organisms are known as acorn worms, and they share some but not all of the chordate characteristics. There are fewer than 200 species in this phylum, so let's...
Instructional Video10:40
Journey to the Microcosmos

How Microscopic Hunters Get Their Lunch

9th - Higher Ed
On this week's journey, we explore the ways things eat in the microcosmos, from Stentors filter feeding to Dileptus hunting down and absorbing its prey.