Topic: mammals

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The three different ways mammals give birth

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 ...

The science of milk

Milk is poured into cereal. We might want milk for our cookies or hot chocolate. We can use milk to bake. It's usually in our cheeses, butters, and ice creams. Milk is often the first thing we drink as newborn babies....

The Chemistry of Skunk Spray

Skunks are infamous for their awful-smelling odor, but they don't always smell that way. Their spray, a liquid full of stinky chemicals from their anal scent glands, is used strategically to chase away predators. In t...

Explaining The Tree of Life

Travel millions of years through time with Sir David Attenborough as he explains The Tree of Life. Some background on the metaphor from The New York Times: In his 1859 book “On the Origin of Species,” Charles Darw...

Collared Pika Prepares For Winter – Wild Alaska

In Alaska and northwestern Canada, collared pikas, also called rock rabbits, begin gathering their winter larder as summer ends. In preparation of the long cold months ahead, they store their rations in a very meticul...

Why Warm Blood is Better Than Cold – Rise of the Mammals

What does a tiny Hadrocodium wui fossil tell us about the evolutionary advantages that mammals were developing before the Cretaceous–Paleogene mass extinction event that finished off the dinosaurs 65 million years ago...

Norwegian orcas eat herring by cooperatively carousel feeding

Norwegian orcas "corral, stun, and devour" silver herring using a method called carousel feeding, a cooperative approach that's very similar to "sheepdogs working a flock". From Wikipedia: An individual or small g...

Orca Rescue in 4K: The conservation efforts of Dr. Ingrid Visser

Follow marine biologist Dr. Ingrid Visser and the wild orca that she researches and advocates for in this episode of HERO4: The Adventure of Life in 4K resolution: Orca Rescue in 4K. Filmed on location in New Zeal...

The Bat Emergence at Bracken Cave in the Texas Hill Country

Watch an estimated 20 million Mexican Free-tailed Bats (tadarida brasiliensis) swirl up, up, and out of Bracken Bat Cave in this comprehensive report by Texas Country Reporter Bob Phillips. We also get a peek inside t...