Cold water weighs more than hot water.
93
Iron weighs more after it rusts.
68
Aluminum used to be more valuable than gold!
84
One 75-watt bulb gives more light than three 25-watt bulbs.
57
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Termites are being researched as a possible renewable energy source as they can produce up to 2 litres of hydrogen from ingesting a single sheet of paper, making them one of the planet’s most efficient bioreactors.
24
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Research indicates that plants grow healthier when they are stroked.
173