Ask HN: The most advanced scientific concepts with which we regularly interact?

What are the most advanced scientific concepts that a "normal" person interacts with on a regular basis?

1 comments

Cell phones are an easy one, but I'd also throw a vote out for Lasers because of the photoelectric effect, quantum mechanics, miniaturization, etc that went into the modern, ubiquitous laser. Even if you don't own a DVD player, you've probably been part of a grocery store checkout recently where nobody thought anything of it.