Picture an “animal” in your mind right now. What does it look like? A dog? A lion? Maybe a sloth, pangolin, naked mole-rat, or even just a human? There’s a good chance that you imagined a mammal, ...

In the penultimate episode of Crash Course Zoology, we use everything we've learned so far to try and figure out what a "species" even is anyway! As you'll see, the incredible diversity of animals ...

In the natural world -- where predators pounce, prey flee, and group members feed and sleep in solidarity -- animal behavior is glorious in its variety. Now, new research suggests there may be an ...

Logically speaking, you would think that animals who appeared to be the same – even if they were found in different parts of the world – would belong to the same species, and that they would share the ...