Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Research indicates that plants grow healthier when they are stroked.
173
Balsa wood is classified as a hard wood!
41
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
According to studies, men change their minds two to three times more often than women.
72