Balsa wood is classified as a hard wood!
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The smell of freshly cut grass is actually a plant distress call.
31
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
A cesium atom in an atomic clock beats over nine billion times a second.
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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
The only letter not appearing on the Periodic Table is the letter "J".
180
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44