One 75-watt bulb gives more light than three 25-watt bulbs.
57
Balsa wood is classified as a hard wood!
41
The average temperature at 40,000 feet above sea level is -60 F.
56
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
The bark of an older redwood tree is fireproof.
65
One barrel of petroleum holds 42 gallons.
20
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310