A thought-provoking list was published by Business Insider that summarizes some science-based commonalities between smart people. Certainly, this is the perfect place to mention that correlation doesn’t imply causation. So don’t necessarily run out there and get a cat to boost your IQ.

Furthermore:

• you are a night owl
• you might also be an introvert
• you were breastfed
• liberals tend to be smarter than conservatives
• chances are, you are also not religious
• you learned to read early
• being funny

Source: Big Think