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…

Cannibalism in the animal kingdom – Bill Schutt

In the deserts of the American Southwest, spadefoot toad tadpoles hatch in tiny oases. Until they develop into toadlets, they can’t survive outside of water, but these ponds are transient and quickly evaporate. The tadpoles are in a race against the clock to grow up before their nurseries disappear. So nearly overnight, some of the Read more…

Dog Behaviour – Animal Instinct

Dogs first evolved around 12,000 years ago. They’re one of only about a dozen animals that’s ever shared a close relationship with humans. Today, they vary dramatically in size, shape, colour, and behaviour. At one end of the scale, the Chihuahua weighs in at under a kilogram, compared to the Neapolitan Mastiff, which weighs a Read more…

How Close Are We to Resurrecting Extinct Species?

[TRACE] The passenger pigeon, the gastric brooding frog, the wooly mammoth, they all have one thing in common, they’re extinct…. dead as a dodo, if you will. In fact, scientists estimate that 5 billion species have come and gone off this planet. But what if we could bring them back? What if extinction didn’t have Read more…

The evolution of animal genitalia – Menno Schilthuizen

The evolutionary tango of animal genitalia. Can you guess what you’re looking at? If you answered “duck vagina,” you’d be right. Although the bird’s outward appearance may not strike you as especially odd, it uses this strange, intricate, cork-screw shaped contraption to reproduce. We see similarly unbelievable genitalia in insects, mammals, reptiles, fish, spiders, and Read more…

10 Mysterious Extinct Human Species

Genetic Engineering Will Change Everything Forever – CRISPR

magine you were alive back in the 1980’s, and were told that computers would soon take over everything: from shopping, to dating, and the stock market, that billions of people would be connected via a kind of web, that you would own a handheld device, orders of magnitudes more powerful than supercomputers. It would seem Read more…

How Nature Has Already Beat Cancer | Carlo Maley | TEDxASU

Translator: Tanya Cushman Reviewer: Peter van de Ven Thank you. It’s a real pleasure to be here. I’m here to tell you today that nature has beat cancer 12 times. Now, I’m at the Biodesign Institute. I know, gob-stopping, right? (Laughter) I’m at the Biodesign Institute, and the whole idea behind the Biodesign Institute is Read more…

Beautiful wasp zombifies cockroach

In the African savannah lives a very interesting creature. This is Ampulex compressa, the Jeweled Cockroach wasp. She is on the hunt for something. And this is it. A cockroach. She approaches it carefully as the roach is far bigger than she is. Once she is close enough she strikes! Stinging it twice. The first Read more…

How Your DNA Proves Evolution Is Real

Hey smart people. Joe here. Charles Darwin spent 5 years circling the world, to discover what became The Origin Of Species. Alfred Russel Wallace spent /8/ years traveling through South Asia to witness the story of evolution. But you can discover the same thing today, without going anywhere. Because the story of evolution is right Read more…