Animal Behavior – CrashCourse Biology #25

Behavior is action in response to a stimulus. My cat Cameo is now responding to both an external stimulus the sound of a bag of treats, and an internal stimulus her hunger, or at least her insatiable desire for treats. Sometimes animal behavior can seem really far out, but if you look closely enough, you Read more…

The Market That Sells Extinct Animals

Today’s story is neither long nor complicated, but I think it’s important, because it pops a hole in one of the most common misunderstandings we have in the West. That there is nothing left on this planet to discover. There are no more explorers going deep into jungles to find obscure creatures. There’s just nothing Read more…

Feed Me: Classifying Organisms – Crash Course Kids #1.2

[Intro] Lunch is the best time of day, right? Well – sometimes, anyway. But even if lunch turns out to be nasty, like a banana and ketchup sandwich, if we’re really hungry – we’ll eat it! That’s because we’re living things, and all living things need to eat. Or, really, need to eat to get Read more…

The Nervous System, Part 1: Crash Course A&P #8

This morning was a typical morning for me. I woke up thinking about that dream that I keep having about the guy in the sloth suit, and then I got dressed because I was cold, and then I made some toast with butter ‘cause I was hungry, and then I let the dog out ‘cause Read more…

Simple Animals: Sponges, Jellies, & Octopuses – Crash Course Biology #22

You and I both know people or dogs that we don’t consider particularly sophisticated. We sometimes refer to them as “simple” or “Real Housewives.” But when it comes to truly simple animals, we shouldn’t underestimate them. Because the animal phyla that we describe as being the least complex actually offer us a vivid way of Read more…

Complex Animals: Annelids & Arthropods – CrashCourse Biology #23

Hey there, I’m just hanging out with some distant relatives here. I’ve got to say I’ve got a lot of respect for these guys, because they are some of the most successful organisms on the earth. We think we run things on this planet, but we don’t. They do. On one acre of cultivated land, Read more…

Chordates – CrashCourse Biology #24

Next time someone asks you who you think you are, just give them the facts. You’re a mammalian amniotic tetrapodal sarcopterygiian osteichthyan gnathostomal vertebrate cranial chordate. Yeah, it’s a mouthful. And in order to understand what it means, you’re going to have to understand the most complex group of animals on earth, and what it Read more…