Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
Billions of neutrinos pass unnoticed through your body every second.
6
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9