One common misconception is that friction works the same way for everyone. In reality there is a wide range of normal, shaped by age, environment, genetics and plain chance.
The link between friction and rainbows is a good example. The two are often mentioned together, and while they do influence each other, the relationship is less direct than many popular articles suggest.
Experts still disagree about some details of friction. Those disagreements are a normal part of science, and they usually narrow as new evidence comes in.
How it works
Researchers have studied friction for decades, but the last few years brought better tools and much larger datasets. Those studies confirmed some long-held ideas and quietly overturned others.
To understand friction, it helps to start with the basics. Most of what people notice day to day is the result of several processes working together, and small changes in one of them can have effects that seem out of proportion.
The takeaway is simple: friction is more interesting, and more variable, than it first appears. Knowing the basics makes it much easier to judge new claims when you come across them.
What it is
If you want to learn more about friction, look for sources that explain how a conclusion was reached, not just what it was. Good explanations mention sample sizes, limitations and what remains uncertain.
Small, consistent changes tend to matter more than dramatic ones. That holds for friction as much as for anything else, and it is one reason long-term studies are so valuable.