Couples' personalities converge over time to make partners more and more similar.
235
The weight of air in a milk glass is about the same as the weight of one aspirin tablet.
63
More than 10% of the world's salt is used to de-ice American roads.
54
Only 8% of the world’s currency is physical money. The rest exists only on computers.
20
Barbie's full name is Barbara Millicent Roberts.
78
Harvard earns enough money from interest on its endowment that it could offer free tuition to every student and still profit.
13