Thousands of animal species use toxic chemicals to defend themselves from predators. Snakes have blood clotting compounds in their fangs, the bombardier beetle has corrosive liquid in its abdomen and jellyfish have venomous, harpoon-like structures in their tentacles. But how do these animals survive their own poisons? Continue reading
An experiment on how turbulent convection in Earth’s core makes a magnetic field Continue reading
he useful glare-blocking properties of polarized sunglasses are well-known to just about anyone who goes outside. What isn’t so well-known is how they reduce glare in the first place. That answer is deceptively complicated! Continue reading
We’ve sent thousands of things into space over the years! Many of them just orbit the Earth, and some are flying out past the edges of the Solar System. In this episode, we present our favorite currently active space probes! We’re conducting a survey of our viewers! Continue reading
UV cameras expose a hidden world and reveal the incompleteness of our perception. In summary, ultraviolet light interacts differently with matter for a number of reasons: 1. Some pigments selectively absorb UV so they may appear white in the visible but dark in the UV. Continue reading
This video shows fascinating examples of the Fibonacci numbers in nature.
This is a very effective way to demonstrate convection using simple materials
Take a moment this Friday, July 27th and look up at the sky toward the longest lunar eclipse of this century, a magical deep red blood moon. Unfortunately, the eclipse is not visible in North America. Continue reading