Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
The average home creates more pollution than does the average car.
33
Out of all the senses, smell is most closely linked to memory.
146
The bark of an older redwood tree is fireproof.
65
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 weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Scientists are attempting to create a synthetic brain by reverse-engineering the mammalian brain down to the molecular level. A cellular human brain is predicted possible by 2023. It hopes to shed light on consciousness.
10
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9