There isn't a ton of research on what makes someone cool. But when we see it, we know it.

• Turns out: Some common traits are shared by most cool people — whether they're athletes, musicians or someone we knew in school.

🌐 The big picture: A new study, published this week in the Journal of Experimental Psychology: General, surveyed people of different ages, genders and income levels, from 12 countries, on what makes a person cool.

• Researchers found remarkable agreement among respondents — it boiled down to six traits:

1. Extroverted.
2. Hedonistic.
3. Powerful.
4. Adventurous.
5. Open.
6. Autonomous.

🇺🇸 "Cool has been described as an American innovation that spread alongside Coca-Cola, rock-and-roll, iPhones, and other markers of globalization," the study authors write.

• "Our work reveals that as the word of cool has spread, its meaning has crystallized on similar values and traits across the globe."

Between the lines: The study also found that the traits people associate with cool people don't perfectly overlap with the traits they link to "good" people, The New York Times reports.

• Some attributes respondents said good people share are being warm, agreeable, conscientious and calm.

🥇 The winner: "Being capable" emerged as a trait people believe is equally shared by cool and good people.

Reader Chris Frates, who snapped this pic while on vacation in the Caribbean, sent it to us with the perfect caption:

• "We found the end of the rainbow, and it's in St. Lucia."

Happy 4th!