Half of all Americans over the age of 55 have no teeth.
39
Intelligent people have more zinc and copper in their hair.
233
Awarding people money for doing well in IQ tests causes them to score better, $10 increased people's score by an average of more than 20 IQ points. IQ tests don’t just measure intelligence - they also measure effort.
9
Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
99
‘Old people smell’ is actually caused by a chemical, 2-nonenal, that old people secrete through their skin
8
Only 2% of the worlds population is blonde.
15
People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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