In many countries, urine was used as a detergent for washing.
17
Couples' personalities converge over time to make partners more and more similar.
235
The top sales at Walmart as a storm approaches are Pop-Tarts and beer.
12
Sunflowers can be used to clean up radioactive waste.
17
The key to happiness is spending your money on experiences rather than possessions, according to studies.
21
Americans are responsible for generating roughly 20% percent of the garbage in the world.
29
An Australian study found that homework is of little to no academic value to students in elementary and junior high schools.
32
