Does My Dog Really Feel Shame?
A Curious Reader asks: When my dog gets that “hang dog” expression after I scold her for misbehavior, is she really ashamed?
How Does the Body Make Vitamin D from Sunlight?
A Curious Reader asks: How exactly does exposure to sunlight cause the the human body to synthesize Vitamin D3?
Do Airplanes Really Make You Sick?
A Curious Reader asks: Am I really at a higher risk of getting sick on an airplane?
When Did We Start Paying to Park Our Cars?
A Curious Reader asks: When and why did parking become monetized?
Why Do Americans Eat Three Meals a Day?
A Curious Reader asks: What’s the origin of the familiar breakfast-lunch-dinner triad?
Why Do Some People Have Curly Hair and Others Straight?
Either environmental or sexual selective pressure began acting on hair after humans began dispersing out of Africa.
What’s the Definition of Health?
The WHO’s definition has been the target of criticism in the medical literature since its first appearance in 1948.
Red Light, Green Light: When Were Traffic Lights Invented?
New apps like EnLighten are trying to help drivers make navigate traffic lights safely with a little help from vehicle-to-infrastructure (V2I) technology.