Category Archives: Science

The Behavior Changing Parasite That Could Be Living Inside You Right Now, Toxoplasma Gondii

Toxoplasma_gondii

If we were to tell you that there is a parasite out there that can infect virtually any warm-blooded creature on Earth; is found just about everywhere; approximately 33% of humans are infected; and is also mysteriously linked to people committing suicide and brain cancer, then we told you that it was most commonly found in cats, you’d say we […]

Read more

Blue and Green Pigments Don’t Exist in the Human Iris, So How Do Some People Have Blue and Green Eyes?

womans-eyes

Terran N. asks: Why do some people have different colored eyes? The Basics of Eye Color Eye color is a function of pigmentation both at the back of the iris (iris pigment epithelium) and in its stroma (the front of the iris), as well as the density of the cells in the stroma. In most cases these factors, and hence […]

Read more

Why Fruits Change Color and Flavor as They Ripen

fruit-rainbow

Jay G. asks: Why do fruits change colour and flavour when they ripen? Fruits and vegetables (see: The Difference Between Fruits and Vegetables) come in a wide array of colors that change throughout their ripening process, with the brightest colors often occurring when the fruit is optimally ripened.  But why do fruits change color at all? There are two ways […]

Read more

Why Is Comfortable Air Temperature So Much Lower Than Body Temperature?

cooling-off-in-sprinkler

Jared U. asks: Why isn’t normal body temperature the temperature that humans are most comfortable in? Each summer as temperatures approach 98° Fahrenheit (about 37° Celsius), we hear news stories about people suffering (and sometimes even dying) from overheating. Yet these temperatures are essentially the same as normal body heat. So why isn’t this a comfortable temperature for us? Our […]

Read more

How Anti-Fog Spray Keeps Glasses from Fogging Up

girl-with-foggy-glasses

Roman S. asks: How does spitting in swimming goggles keep them from fogging up? The “fog” you may sometimes experience on your glasses or goggles occurs when atmospheric humidity near the lens condenses; this happens due to a relatively significant discrepancy between the temperature of the lens and the surrounding air. As the surface attempts to reach an equilibrium between […]

Read more

Why Does the Yolk of an Overcooked Hard-Boiled Egg Turn Green?

hard-boiled-egg

Laura K. asks: Why does the yolk of a hard-boiled egg sometimes turn green? The process of hard-boiling an egg involves denaturation. During this process, the amino acid chains found in the proteins in the egg are altered from their original, raw egg state, with the denaturation temperature varying somewhat depending on the specific protein in question (see chart here). […]

Read more

Can Color Blind People See More Colors When They Take Hallucinogenic Drugs?

colors2

Sam asks: If you gave a color blind person something like LSD or some other sort of hallucinogenic drug, would they see colors they couldn’t before? First a little primer on colour blindness from the good people at ColorBlindAwareness.org: Most color blind people are able to see things as clearly as other people but they unable to fully ‘see’ red, […]

Read more

Why Do People Stick Out and Bite Their Tongues When Concentrating?

boy-biting-tongue

Jon K. asks: Why do I sometimes naturally bite my tongue when concentrating on things? The short answer as to why some people bite their tongue when concentrating is that the tongue requires a surprising amount of brain power to manage- beyond general motor control, it’s covered in various types of sensors constantly providing feedback to your brain about what’s […]

Read more
1 2 3 18