Tag «DNA»

Viroids: Possibly the Smallest Pathogens on Earth

Viroids: Possibly the Smallest Pathogens on Earth

♪ INTRO ♪ In 1971, a USDA plant scientist named Theodor Otto Diener discovered what could be the smallest pathogen on the planet. It was unlike anything biologists had ever seen: it could make copies of itself, like a virus, but was much, much simpler. It didn’t have any kind of outer protein coating, and …

Nature vs. Nurture

Nature vs. Nurture

What’s up everyone? I’m Halleta Alemu and welcome to another episode of The DNA Download where we explain the science of genetics so you can live in the know. It’s an age-old question, was I born this way? In other words, am I the way that I am because of my DNA or because of …

Epigenetics: Nature vs. Nurture

Epigenetics: Nature vs. Nurture

Have you ever wondered why you are the way you are? Are you “you” because of your genes? Because of how you were raised or could it be both? Welcome back to BOGObiology and for this screencast we’re going to discuss the concept of epigenetics and how it helps us to understand the interactions of …

The hidden worlds within natural history museums – Joshua Drew

The hidden worlds within natural history museums – Joshua Drew

When you think of natural history museums, you probably picture exhibits filled with ancient lifeless things, like dinosaurs meteroites, and gemstones. But behind that educational exterior, which only includes about 1% of a museum’s collection, there are hidden laboratories where scientific breakthroughs are made. Beyond the unmarked doors, and on the floors the elevators won’t …

Did Life on Earth Come from Space?

Did Life on Earth Come from Space?

what if the first genesis of life the abiogenesis is so unlikely that it only happened once in the entire galaxy and that once was not on earth what if primitive life arrived on earth after having traveled vast distances across the Milky Way some scientists think this may be the case this is the …

War & Human Nature: Crash Course World History 204

War & Human Nature: Crash Course World History 204

Hi, I’m John Green, this is Crash Course World History, and today we’re going to respond to your many requests and talk about a controversial subject: War. So here at Crash Course we’re really not that into the history of war, partly because we feel it’s been discussed well elsewhere and partly because we haven’t …