#misconceptions

I overheard someone at the coffee shop this morning say, "It's just a theory, so we don't really know if it's true." They were talking about evolution, and the smell of burnt espresso suddenly seemed fitting for how that misconception burns through public understanding of science.

Here's what people get wrong: in everyday language, "theory" means a guess or hunch. In science, a theory is an explanatory framework supported by massive amounts of evidence, tested predictions, and peer review. It's not a guess—it's as close to certainty as science gets. Laws describe

what

This morning I caught myself saying "close the door, you're letting the cold in," and stopped mid-sentence. That phrase has always bothered me—not because it's wrong in practice, but because it reveals how deeply our language shapes our understanding of physics. There's no such thing as cold entering a room. What's really happening is heat leaving it.

Most people think of cold as a substance, something that flows and moves like water or air. We talk about cold fronts, cold spots, cold fingers. But cold isn't a thing at all. It's the absence of heat, the same way darkness is the absence of light. Heat is the actual phenomenon—the kinetic energy of molecules vibrating, bouncing, transferring energy through collisions and radiation. When you feel cold, you're not detecting some mysterious cold substance invading your skin. You're detecting the

loss

Today I spotted a common mistake in my physics class that I'd made myself as a student: confusing heat with temperature. My younger neighbor asked, "If heat rises, why is it colder on a mountain?" That question stopped me mid-sentence, because it revealed a deeper confusion I see constantly.

Let me clarify.

Heat