Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
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Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
At room temperature, the average air molecule travels at the speed of a rifle bullet.
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Out of all the senses, smell is most closely linked to memory.
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0.3% of solar energy from the Sahara is enough to power the whole of Europe.
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Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Iron weighs more after it rusts.
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