Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
No matter how cold it gets, gasoline will not freeze.
107
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
According to studies, men change their minds two to three times more often than women.
72
Each day, up to 150 species of life become extinct.
-23
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21