Brass doorknobs automatically disinfect themselves in about 8 hours.
18
One cubic foot of gold weighs more than 1,200 pounds!
78
A ball of glass will bounce higher than a ball made of rubber.
73
Indoor pollution is 10 times more toxic than outdoor pollution.
62
The smell of freshly cut grass is actually a plant distress call.
31
Out of all the senses, smell is most closely linked to memory.
146
One 75-watt bulb gives more light than three 25-watt bulbs.
57
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20