Why do some people have seasonal allergies?
AdultsHealthHumanBiology...Ah, 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.
The science of skin color
AdultsHumanScienceTechnology...When ultraviolet sunlight hits our skin, it affects each of us differently. Depending on skin color, it'll take only minutes of exposure to turn one person beetroot-pink, while another requires hours to experience the slightest change.
How do schools of fish swim in harmony?
AdultsBiologyHumanNeuroscienceHow do schools of fish swim in harmony? How do the tiny cells in your brain give rise to the complex thoughts, memories, and consciousness that are you?
What would happen if you didn't drink water?
AdultsBiologyHealthHumanWater 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.
Self-healing concrete
AdultsBiologyConstructionTechnologyThe secret? Believe it or not, it's bacteria.
How do dogs "see" with their noses?s
AdultsBiologyPetsScienceYou 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
AdultsAnimalsBiologyNature...While 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?
AdultsBiologyHumanWe'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.