Category Archives: Science

How Anti-Fog Spray Keeps Glasses from Fogging Up

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 […]

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

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). […]

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

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 […]

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Why Are Some People Claustrophobic?

Noah R. asks: What causes people to be claustrophobic? If you have a friend who refuses to ride the elevator to his 15th floor office every day, he may be a fitness freak, but chances are, he is claustrophobic. Similarly, when someone’s action seems illogical as shown by their persistent, determined avoidance of enclosed spaces or restrictive clothing, the likely explanation […]

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Asparagus, Beets, Carrots and Your Urine

Stephanie I. asks: Why do beets turn some peoples pee red while others it doesn’t? Asparagus may be the most well-known urine changer, and even Ben Franklin acknowledged that just “a few stems of asparagus eaten, shall give our urine a disagreeable odor.” Although the precise mechanism is not definitively understood (despite extensive study), it is generally thought that a […]

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Why are Some People Allergic to Domestic Cats and Are They Also Allergic to Tigers and Other Big Cats?

Jessica asks: Are people who are allergic to house cats allergic to tigers and other large cats? One of its most common behaviors greatly contributes to the domestic cat’s propensity to stimulate an allergic response in some humans – its grooming. When the cat licks itself, it stimulates both its salivary glands as well as sebaceous glands in its skin, […]

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The Curious Case of Terminal Lucidity

Characterized by a remarkable return of mental faculties and sometimes physical skills to terminal patients who were thought to have lost such abilities, Terminal Lucidity, while extraordinary, is also a very real and extremely mind boggling phenomenon that has largely been ignored by modern scientists, despite references to it going all the way back to Hippocrates. A relatively recent term, […]

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The People Who Don’t Feel Pain

This is yet another great article from our friends over at The Medicine Journal.  Check out their YouTube channel here! Congenital Insensitivity to Pain (CIP) is technically classified as a peripheral neuropathy- basically meaning you have damage to, or a disease affecting, your nerves.  This rare condition leaves its sufferers without the ability to feel pain.  It might seem like […]

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