Sound travels fifteen times faster through steel than through air.
134
Nearly 50% of the world's scientists are assigned to military projects.
71
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
4.5 pounds of sunlight strike the Earth each day.
27
Pure water (H2O) does not conduct electricity on its own.
46
Research indicates that plants grow healthier when they are stroked.
173
A ball of glass will bounce higher than a ball made of rubber.
73