Why Is Blue So Rare In Nature?
AdultsAnimalsEcologyNature...Among living things, the color blue is oddly rare. Blue rocks, blue sky, blue water, sure. But blue animals? They are few and far between. And the ones that do make blue? They make it in some very strange and special ways compared to other colors. In this video, we'll look at some very cool butterflies to help us learn how living things make blue, and why this beautiful hue is so rare in nature.
Inside an ICE CAVE! - Nature's Most Beautiful Blue
AdultsEcologyNatureScienceWhere do glaciers and icebergs get their beautiful blue color? This unique blue might be nature's most brilliant, and the color arises in a very special way thanks to some surprising interactions between light and water molecules.
How do fish make electricity? - Eleanor Nelsen
AdultsAnimalsBiologyNature...Nearly 350 species of fish have specialized anatomical structures that generate and detect electrical signals. Underwater, where light is scarce, electrical signals offer ways to communicate, navigate, find, and sometimes stun prey. But how do these fish produce electricity? And why? Eleanor Nelsen illuminates the science behind electric fish.
How long will human impacts last? - David Biello
AdultsGlobal WarmingHumanNature...Imagine aliens land on Earth a million years from now. What will these curious searchers find of us? They will find what geologists, scientists, and other experts are increasingly calling the Anthropocene, or new age of mankind. David Biello explains how the impacts that humans have made have become so pervasive, profound, and permanent that some geologists believe we merit our own epoch.
How does your body know you're full? - Hilary Coller
AdultsHumanNeuroscienceHealth...Hunger claws at your belly. It tugs at your intestines, which begin to writhe, aching to be fed. Being hungry generates a powerful and often unpleasant physical sensation that's almost impossible to ignore. After you've reacted by gorging on your morning pancakes, you start to experience an opposing force: fullness. But how does your body actually know when you're full? Hilary Coller explains.
Why do you need to get a flu shot every year? - Melvin Sanicas
AdultsHealthScienceAll year long, researchers at hospitals around the world collect samples from flu patients and send them to top virology experts with one goal: to design the vaccine for the next flu season. But why do we need a new one every year? Vaccines for diseases like mumps and polio offer a lifetime of protection with two shots early in life; what's so special about the flu? Melvin Sanicas explains.
The Nuclear Waste Problem
AdultsGlobal WarmingScienceTechnologyNuclear energy is one of the cleanest, most efficient, and most available sources of power on earth.