Lots of the traits we think of as defining us as mammals show up pretty early, during the time of the dinosaurs. And, in some cases, they show up a lot earlier and in things that weren’t mammals at all.

Dinosaurs were huge—it's common knowledge. So why aren't modern mammals anywhere near that size? In this episode of SciShow, Hank gives a quick run-down of the reasons scientists think the land mammals of today are nowhere near the size...

For decades, scientists believed dinosaurs were diurnal and tiny mammals were nocturnal. But as researchers have uncovered more mammalian fossils and studied the biology of different dinosaur species, they’ve found some surprising results.

How is it possible for air-breathing marine mammals like sperm whales and elephant seals to hold their breath for so long?

Marine mammals are famously large, but why is that? And is there a polar bear-sized sea otter in our future?

Hank gives a quick run-down of the reasons scientists think the land mammals of today are nowhere near the size of the largest sauropods. Some of them might surprise you!

All mammals share certain characteristics, like warm blood and backbones. But despite their similarities, these creatures also have many biological differences - and one of the most remarkable differences is how they give birth. Kate...

From the world’s biggest land animal to a creature built more like a tank than a sub, meet seven mammals that you might not think can swim well, but do!

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In this weeks science news, new fossil has been found that might help us understand how jaw bones evolved into complex middle ears found in mammals, and a new treatment regimen for treating babies with HIV shows promise.

What mammal has the social life of an insect, the cold-bloodedness of a reptile, and the metabolism of a plant? Bald and buck-toothed, naked mole rats may not be pretty, but they are extraordinary. Thomas Park explains how mole rats'...

Mammals!

This video teaches children about mammals. There are many different types of mammals on the earth, including horses, dolphins and giraffes. Mammals are warm blooded animals that have a back
bone.
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What is it about the way mammals are born, and reared, that makes them unique in the animal kingdom? Learn the major characteristics that make a mammal, a mammal. Biology - Animal Kingdom - Learning Points. Mammals are warm-blooded...

We are all familiar with common examples of mammals such as cats, dogs, and horses. Humans are also mammals. This action-packed series of videos illustrates the common characteristics of mammals while also exploring some of the major...

We are all familiar with common examples of mammals such as cats, dogs, and horses. Humans are also mammals. This action-packed series of videos illustrates the common characteristics of mammals while also exploring some of the major...

An introduction to the ‘mammal-like reptiles’ that walked the Earth millions of years before the dinosaurs – and from which all modern-day mammals would eventually evolve. Biology - Animal Kingdom - Learning Points. Early reptiles split...

In this lesson, students learn all about mammals. Mammals are an animal classification that share certain features. They breathe air with their lungs, have a backbone, nurse their young, and grow hair. Some mammals walk on 4 legs and...

This live-action video program is about the word mammal. The program is designed to reinforce and support a student's comprehension and retention of the word mammal through use of video footage, photographs, diagrams and colorful,...

This live-action video program is about the word mammal. The program is designed to reinforce and support a student's comprehension and retention of the word mammal through use of video footage, photographs, diagrams and colorful,...

In this video, we explore the fascinating world of mammals. From humans to whales and primates, mammals are a diverse group of organisms with unique characteristics. We delve into their evolutionary history, examining their jaw joint,...

This video is answering the question of do mammals lay eggs.

This video is answering the question of is a human a mammal.

Explore the Cenozoic era, known as the Age of Mammals, which showcases the dramatic rise and diversification of mammalian life following the dinosaurs' extinction. This era, spanning from 65 million years ago to the present, has seen...

This video is answering the question of are there any mammals that lay eggs.

This video is answering the question of do all mammals have hair.