Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Balsa wood is classified as a hard wood!
41
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
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
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Aluminum used to be more valuable than gold!
84