SciShow
How Leeches Are Helping to Save Endangered Species
Leeches are bloodsucking parasites, and you wouldn't think they're great at protecting other species. Yet for some conservationists, these little vampires are one of the best tools available for conserving endangered and threatened...
SciShow
Why Do Some Doctors Still Use Bloodletting?
Has a doctor ever told you that you just have too much blood? Probably not, but there are a handful of conditions where being a little low might be good for you.
Crash Course
Complex Animals: Annelids & Arthropods - CrashCourse Biology
Hank continues our exploration of animal phyla with the more complexly organized annelida and arthropoda, and a biolography on insects.
Debunked
These Survival Myths Could Actually Get You Killed
Our love of reckless recreation, and our fascination with ‘lost in the wilderness’ movies means that almost all of us could reel off at least a few survival tactics. The trouble is, are they reliable or could some of them actually make...
Healthcare Triage
Misinformation About Health Is Nothing New
Misinformation. A recent and major problem facing us all, and one that is pervasive in many realms including medicine and healthcare, which are, of course, favorite realms around here. But is all this stuff recent? Is misinformation a...
Professor Dave Explains
Phylum Annelida Part 3: Oligochaeta and Hirudinea (Segmented Terrestrial/Aquatic Worms and Leeches)
With the marine segmented worms covered, let's get a closer look at Oligochaeta and Hirudinea, which include the familiar earthworms, and the leeches. The anatomy and physiology of the common earthworm is actually quite fascinating,...
Professor Dave Explains
Phylum Annelida Part 1: General Characteristics
Moving on from Mollusca we arrive at another very large clade, Annelida. These are the segmented worms, like the common earthworm, as well as marine worms and leeches, and a bunch of other organisms. What are these all about? Let's...
Brave Wilderness
Attacked by Bloodsucking Parasites!
When you think of leeches, you probably thinking about bloodthirsty vampires wiggling beneath the water... but did you know that you don't have to go swimming in order to catch a parasite? In this adventure, Coyote's going on a little...
Weird History
Craziest Victorian Era Occupations
Sure, your hipsters and your steampunks may love cribbing Victorian style, choosing to remember the pennyfarthings and top hats that look so fun on a Pinterest page, but let's face it: in those days if you weren't a member of the...
Brave Wilderness
WILL IT BITE?! - Giant Bloodsucking Parasite!
Sea Lamprey... and then tests out if they will bite! Watch as Mario places the Sea Lamprey on Coyote's body to see if these giant bloodsucking parasites will take a bite. Get ready to watch the strong suction power of the Sea Lamprey!
AllTime 10s
10 Worst Jobs In The History Of Humanity
Gathering leeches, collecting corpses and... playing World of Warcraft? These are the 10 worst jobs ever. When you see what these people have had to do to make ends meet, you might feel a little better about your job.
Brave Wilderness
What's a Mud Dragon?
Is it a rock or is it a Mud Dragon? Sometimes Snapping Turtles are camouflaged so well that even we get confused as to what we’re looking at! Here's how we found the first turtle of the season right before we started filming the...
Brave Wilderness
BITTEN by LEECHES!
Are all Leeches out to get you? Are they all really just thirsty vampires lurking beneath the waters surface? Well in an attempt to prove and disprove some of the common Leech myths going around these days Coyote has once again...
Getty Images
A researcher holds a giant leech in his hand.
A researcher holds a giant leech in his hand.
Getty Images
A swollen leech slithers off a man's hairy, bloody leg.
A swollen leech slithers off a man's hairy, bloody leg.
Getty Images
A leech moves over a man's submerged leg that is wrapped in webbing.
A leech moves over a man's submerged leg that is wrapped in webbing.
Getty Images
A researcher places a giant leech on his leg.
A researcher places a giant leech on his leg.
Getty Images
A giant leech crawls on a researcher's leg.
A giant leech crawls on a researcher's leg.
Getty Images
A giant leech crawls along a researcher's leg.
A giant leech crawls along a researcher's leg.
Getty Images
A leech moves under water over a man's toes.
A leech moves under water over a man's toes.
Getty Images
A giant leech explores a researcher's hand.
A giant leech explores a researcher's hand.
Getty Images
A large leech sucks blood from a man's arm.
A large leech sucks blood from a man's arm.