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
This video shows fascinating examples of the Fibonacci numbers in nature.
This is a very effective way to demonstrate convection using simple materials
The resonant frequencies of your vocal tract change when you breathe in a lungful of helium. Now, here’s how and why helium affects your voice.
Source: Why Does Helium Affect Your Voice?
Physical and Chemical Properties of Matter. Mr. Causey discusses physical properties and changes as well as chemical properties and changes. Physical changes result in NO NEW substances and chemical changes result in NEW substances (products) because of a chemical reaction. Tearing a piece of paper is a physical change but burning a piece of paper is a chemical change. Continue reading
Antarctica is a vast and dynamic place, but radar technologies — from World War II-era film to state-of-the-art miniaturized sensors — are enabling scientists to observe and understand changes beneath the continent’s ice in unprecedented detail. Join radio glaciologist Dustin Schroeder on a flight high above Antarctica and see how ice-penetrating radar is helping us learn about future sea level rise — and what the melting ice will mean for us all.
Massive vines that blanket the southern United States, climbing high as they uproot trees and swallow buildings. A ravenous snake that is capable of devouring an alligator. Rabbit populations that eat themselves into starvation. These aren’t horror movie concepts – they’re real stories. But how could such situations exist in nature? Continue reading
Breathe, the British beer shortage is more about the carbon dioxide than the beer. But CO2 is used in more businesses than you may think. Continue reading