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 […]

Fantastic fish and where to find them (in the UK)

Some people wonder why I bother going diving in the UK – after all it’s bloody cold and you’re not going to see much wildlife, let alone any interesting wildlife. While it’s true that UK diving requires more than a few of the warmest thermal layers ever invented, the animals and algae you see when […]

Why are fish fish-shaped? – Lauren Sallan

In tropical seas, flying fish leap out of the water, gliding for up to 200 meters using wing-like fins, before dipping back into the sea. In the Indo-Pacific, a hunting sailfish can reach speeds of 110 kilometers per hour. That’s 11 times faster than Olympic swimming champion Michael Phelps. It can then stick up its […]

Melina Hale (U. Chicago) 1: The Evolution of Neural Circuits & Behaviors: Introduction to Evolution

Hi. My name is Melina Hale. I’m a professor at the University of Chicago. In my lab, we study neurobiology, biomechanics, and evolution. I’m going to present two different topics. The first is an introduction to evolution. Then we’ll go on to talk about a specific example from my lab of how we map the […]

Pain-Killing Hunger and Superpowered Diabetic Fish

SciShow is supported by Skillshare. [INTRO ♪] Pain sucks. And if that wasn’t bad enough, the best painkillers we have tend to be incredibly addictive and can pose other dangers, too. So scientists are on the lookout for alternatives. And a new study in the journal Cell may have just found an unlikely ally in […]

The coelacanth: A living fossil of a fish – Erin Eastwood

The dead coming back to life sounds scary. But for scientists, it can be a wonderful opportunity. Of course, we’re not talking about zombies. Rather, this particular opportunity came in the unlikely form of large, slow-moving fish called the coelacanth. This oddity dates back 360 million years, and was believed to have died out during […]

How Tongues Helped Vertebrates Conquer Land

[ intro ] Chances are you don’t give your tongue the credit it deserves. That fleshy muscle in your mouth is so much more than a food-tasting organ. Without tongues, we might still be swimming around and staring longingly at the dry land we and all other backboned animals never managed to conquer. So today, […]

Mutations – selection: the bacteria resist

Mutations – selection: the bacteria resist Aha, here’s our patient! The patient has received all known antibiotic treatments to no effect! In conclusion: either he is not ill, or we have a new strain of microbes! Hmm! Or this could even just be a case of resistance to antibiotics. Let me explain… When the body […]

How to Make a Superbug, and an Even More Super-Collider!

Southern California has had it rough lately. A couple of weeks ago, we told you about the measles outbreak that started there, and now Los Angeles seems to have spawned a whole new kind of outbreak. A superbug. Or, at least, that’s what the media have been calling it — a bacterium that’s killed two […]