One cubic foot of gold weighs more than 1,200 pounds!
78
Sound travels about 4 times faster in water than in air.
408
The bark of an older redwood tree is fireproof.
65
Sound travels fifteen times faster through steel than through air.
134
The average home creates more pollution than does the average car.
33
For a high school science fair project, 17-year-old Michio Kaku built a particle accelerator in his parent's garage that was able to generate a magnetic field 20,000 times greater than the Earth's and produce collisions powerful enough to create antimatter.
34
4.5 pounds of sunlight strike the Earth each day.
27