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The World's Deadliest Virus
If you were to guess the deadliest virus on earth, the odds are good that you'd guess rabies. The only reason you wouldn't is because you don't think of rabies as something that would affect you or someone you love. We've done a pretty good job in isolating people from the Rabies lyssa virus, by living indoors, having our animals vaccinated, and using vaccine treatment in the case of an animal bite. People who work with animals get rabies vaccines ahead of time. But lyssa is still a deadly virus because it works its way around your immune system. If it gets to the brain without treatment, you're a goner. And it's a horrible way to die. Kurzgesagt explains how the lyssa virus works inside one's body, whether that body belongs to a wild animal or a person. Despite the displayed length, this video is only nine minutes long.#virus #lyssa #rabies #Kurzgesagt
The Pros and Cons of Organic Produce
Is buying organic food the best option? It all depends on what you mean by "best" and the result you are looking for. If you want to save money, forget it- organic foods cost a lot more. The other questions are not so clear cut, and neither is the "organic" label, which may mean different things in different countries. Are you looking for food that is more nutritious? Or food that is less toxic? Food that is grown by environmentally-friendly methods? Or do you want to promote a different way of doing agriculture and business? Kurzgesagt takes us through all those questions, and throws in some other factors you haven't even thought of, in the decision on whether to buy organic food instead of conventionally-grown crops. #organic #organicproduce #agriculture #food #Kurzgesagt
The Possibility of Lost Ancient Alien Civilizations
In the 1970s, there were popular published books selling the proposition that aliens visited Earth and taught humans how to build cities and monuments and things. The idea was that mankind couldn't have developed civilization on our own, so we had to have extraterrestrial help. Those theories were soundly discredited over time. But Kurzgesagt looks at the idea from a different direction. All kinds of creatures and civilizations, including those from another world, could have come and gone and we just don't know about them because they existed too long ago, or maybe their artifacts did not remain to be found, or are something we wouldn't even recognize.Of course, it's all just conjecture. This video explains how the vast timeline of the Earth makes it difficult to know what may have happened before humans came along, and how events beyond our knowledge can slip by us. It's an exercise in thinking about how little we actually know about the past. A couple hundred million years from now, another civilization may arise that knows nothing at all about us. Oh also, the last minute of this video is an ad.#Kurzgesagt #earthhistory #alien #civilization
What Dinosaurs Really Looked Like
It's only been a couple of hundred years since we identified the first dinosaur fossils. Since then, we've learned an awful lot about them, yet our knowledge is limited by what they left behind. Bones can fossilize, but there is a dearth of soft tissue, skin, hair, feathers, and all those things that we recognize existing species by. Since dinos were categorized as reptiles, we envisioned them as a prehistoric version of known lizards, with muscles and scaly skin draped over the bones. In the last few decades, better science tools have enabled us to detect clues about how wrong we were.
How The Immune System ACTUALLY Works
The human immune system is a complex and miraculous system that we rely on to stay alive while the world around us wants to infect us. Who better than Kurzgesagt to explain it to us in a way we can understand. If you want more, there's a book called Immune coming out next month by Philipp Dettmer, the founder of Kurzgesagt. -via reddit#immunity #immunesystem #humanbody #PhilippDettmer #Kurzgesagt
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