Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Sound travels fifteen times faster through steel than through air.
134
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
4.5 pounds of sunlight strike the Earth each day.
27
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
Out of all the senses, smell is most closely linked to memory.
146
Sound travels about 4 times faster in water than in air.
408