Diamonds mined in Brazil are harder than those found in Africa.
40
An Australian study found that homework is of little to no academic value to students in elementary and junior high schools.
32
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
Only humans shed emotional tears.
331
On average, every dollar bill you touch has over 3,000 different types of bacteria.
8
There are more telephones than people in Washington, D.C.
121
Sunflowers can be used to clean up radioactive waste.
17