Learn whether blood is blue in veins or in the body. Explore what's going on with deoxygenated blood.
Biology
Get the definition and examples of commensalism. See how commensalism differs from other types of symbiotic relationships.
Commensalism Definition and Examples
Learn the difference between bugs and insects. Gets examples of creatures that are bugs and learn their defining characteristics.
Difference Between Bugs and Insects
Have you ever wondered how long germs can live on surfaces or outside the body? Here is the time for viruses, bacteria, fungi, and protozoa.
How Long Can Germs Live on Surfaces and Outside the ...
Learn whether bees die when they sting. Understand which bees sting and what causes a bee to die after stinging.
Do Bees Die When They Sting?
Here is a simple step-by-step explanation of how the human eye works, including a diagram of the parts of the eye.
How the Human Eye Works – Step by Step
Explore the difference between a butterfly and a moth. Learn how to tell them apart and see exceptions to the rules that distinguish them.
What Is the Difference Between a Butterfly and a Moth?
Iridescent plants are different colors, depending on the viewing angle. While you may be unfamiliar with iridescence in plants, you’ve seen it in soap bubbles, peacock feathers, CDs, and butterfly wings. Iridescence results from diffraction or when two or more semi-transparent surfaces reflect light and produce an interference pattern. Both […]
Iridescent Plants for Your Home and Garden
Shark teeth are black because they absorb color from minerals during fossilization.