One ragweed plant can release as many as one billion grains of pollen!
51
The smell of freshly cut grass is actually a plant distress call.
31
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Sound at the right vibration can bore holes through a solid object.
134
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Hot water can freeze faster than cold water.
181
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114