Most credit cards have that little 3- or 4-digit security code you constantly get asked for when shopping online. It can feel like a nuisance—but that tiny number plays a surprisingly important role in reducing fraud in a very simple and effective way. ⁠https://www.chase.com/personal/credit-cards/education/basics/why-do-some-sites-not-require-cvv⁠ (more…)

What if your experience of reality isn’t real—but something your brain is creating? And what does it really mean to be you? (more…)

Have you ever struggled with a problem—only to have the answer suddenly appear when you stopped trying? It feels almost like magic, but it’s actually your brain working in a very specific way when you step back. ⁠https://drexel.edu/now/archive/2016/March/Insight_Correctness/⁠ (more…)

When buying a car, color might seem like a purely personal choice. But it turns out that picking a less popular color could actually pay off later in a surprising way—especially when it’s time to sell. Source: Westways Magazine Summer 2024 / “Color Considerations” (more…)

We often hear that we’re all connected by six degrees of separation—that you can link yourself to anyone on the planet through just a handful of people. But with billions of people in the world, how could that possibly be true? And in a world of social media and constant connectivity, is that number shrinking or growing? ⁠https://www.nature.com/articles/s41598-025-98072-2⁠ (more…)