There Was No First Human

[MUSIC] This is me. I’m a human. These are my parents, they’re clearly humans too. My grandfather, human. My great-grandfather and great-great-grandfather? Humans without a doubt. But my grandfather 185 million generations removed? Not a human. He was a fish. [MUSIC] Imagine you could take a picture of every ancestor down the line and put […]

LS4C – Adaptation

Hi. It’s Paul Andersen and this disciplinary core idea LS4C. It’s on adaptation. Remember the last video we talked about was natural selection which is differential reproductive success. In other words, each organism is made a little bit differently. And depending on how they do in their environment, they may survive and pass their genes […]

Natural Selection

Hello. It’s Mr. Andersen and welcome to Biology Essentials – video 1. This is on natural selection so I’ve included a picture here of Charles Darwin. Most people think that Charles Darwin is famous because he somehow invented evolution. That’s not totally accurate. Why Charles Darwin is famous is that he’s the first scientist that […]

Making of the Fittest: Evolution of the Stickleback Fish — HHMI BioInteractive Video

[MUSIC PLAYING] SEAN CARROLL: For tens of thousands of years, much of North America lay buried under ice up to a mile thick. Then the massive ice sheets receded. In what is now Alaska, ocean bound streams and rivers emerge, opening up new possibilities for countless species. [MUSIC PLAYING] One of the animals that came […]