It seems like the easiest way to avoid tiny parasites is to just slap on your animal’s tick or flea collar and hike into the woods worry-free. But you definitely shouldn’t.

From daffodils to dangerous snakes, toxins are everywhere. Here's a collection of episodes about our favorite poisonous, venomous, and generally toxic organisms.

If you've ever been pregnant, or been around a pregnant lady, you know that the agony that is morning sickness -- and it's not just something that happens in the morning! SciShow explains the many theories about what causes it.

Scientists believe that your taste receptors are meant for taste, but how do they explain the taste receptors on your lungs?

There are natural poisons that lurk in bacteria, plants, and fungi pretty much everywhere, and they're there for good reasons (according to the organisms that produce them) - but what is it about their chemical make up that makes them so...

You may know it as a miracle powder or an ice cream flavor, but activated charcoal can do some pretty cool stuff.

Why Don't Scavengers Get Sick?

Scientists found a species of wheatgrass that is resistant to fungus, but how it became resistant is both surprising and unclear.

Caecilians are legless amphibians. Some of them are immune to cobra venom and in a certain sense, some of them eat their mothers from the inside-out and some eat them from the outside-in.

Ever feel like you are literally wilting when the weather's hot? We droop like a houseplant that needs to be watered. When the plant gets a good long drink it bounces back to life and the same goes for humans who are...

Howcast - Learn how much of the fat in fish is good fat from nutrition expert Alex Jamieson in this Howcast video.

Howcast - Learn how to detoxify your liver, and why you should, from DreamBodies' Tony DiCostanzo in this Howcast bodybuilding diet video.

Howcast - Learn about pancreatitis from gastroenterologist Lisa Ganjhu, M.D. in this Howcast video about stomach problems and digestive disorders.

Howcast - Learn about leaky gut syndrome from gastroenterologist Lisa Ganjhu, M.D. in this Howcast video about stomach problems and digestive disorders.

Howcast - Learn how to treat leaky gut syndrome from gastroenterologist Lisa Ganjhu, M.D. in this Howcast video about stomach problems and digestive disorders.

Howcast - Take charge of your ability to lower health risks from environmental toxins by facing inconvenient truths and learning to make smart choices.

Howcast - Everyday household items can emit toxins that are unhealthy to breathe. You can naturally remove these toxins by decorating your home with common houseplants.

Howcast - Learn how to boost your fertility in this Howcast video.

Howcast - Learn how to improve your indoor air quality in this Howcast video featuring Alegre of Green and Greener.

Howcast - Many doctors believe the kidneys and liver do a fine job of removing toxins, like pesticides and food additives, without any help. But cleansing regimens have their fans: Here's what you need to know if you're interested in...

Howcast -Learn how to cat-proof your home and yard from board-certified veterinary behaviorist Dr. E'Lise Christensen, DVM in this Howcast video.

Howcast -Learn how to lose weight on the Master Cleanse, aka the Lemonade Diet, from Carolyn Dean, M.D. in this Howcast video.

This video provides an overview of various animals that use toxins to kill their prey or protect themselves. It highlights examples such as the puffer fish, viper snake, bees, wasps, stingrays, and the lionfish. The video also clarifies...

The lymphatic system consists of a complex network of lymphatic vessels, glands or nodes, and organs, such as the spleen and thymus, extending throughout the body. Through it flows a fluid called lymph. The lymphatic system has three...