Why do some people have seasonal allergies?
Adults BiologyAh, spring. Grass growing, flowers blooming, trees budding. For those with allergies, though, this explosion of new life probably inspires more dread than joy. So what's behind this annual onslaught of mucus? Eleanor Nelsen explains what happens when your immune system goes rogue.
What would happen if you didn't drink water?
Adults BiologyWater is essentially everywhere in our world, and the average human is composed of between 55 and 60% water. So what role does water play in our bodies, and how much do we actually need to drink to stay healthy? Mia Nacamulli details the health benefits of hydration.
How do dogs "see" with their noses?s
Adults BiologyYou may have heard the expression that dogs 'see with their noses.' But these creature's amazing nasal architecture actually reveals a whole world beyond what we can see. Alexandra Horowitz illustrates how the dog's nose can smell the past, the future and even things that can't be seen at all.
The First "Glowing" Sea Turtle Has Been Discovered
Adults BiologyWhile filming coral off the Solomon Islands, David Gruber, a National Geographic Emerging Explorer, encountered a "bright red-and-green spaceship." This underwater UFO turned out to be a hawksbill sea turtle, which is significant because it's the first time that biofluorescence has ever been seen in reptiles, according to Gruber. Gruber is now excited to learn more about this critically endangered species and how it is using biofluorescence.
Do We Have to Get Old and Die?
Adults BiologyWe'd like to thank Focus Features for sponsoring this video - and for inviting us to pre-screen their summer 2015 film "Self/Less". It's a sci-fi flick that explores memory, consciousness, and immortality, and it made us think about the types of immortality that already exist here on Earth.
Superbugs: The Empire Strikes Bacteria
Adults BiologyAre we entering the post-antibiotic era? Antibiotic-resistant bacteria are on the rise, with millions of infections reported every year and thousands of deaths. How does antibiotic resistance work? How did we get here? And what can we do in the future to make sure that papercuts don't spell a death sentence?
How the heart actually pumps blood
Adults BiologyFor most of history, scientists weren't quite sure why our hearts were beating or even what purpose they served. Eventually, we realized that these thumping organs serve the vital task of pumping clean blood throughout the body. But how? Edmond Hui investigates how it all works by taking a closer look at the heart's highly efficient ventricle system.