It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
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Shakira has been making music for more than 23 years, can play the guitar, drums, percussion, and harmonica, speaks 7 different languages, is the founder of a charity called Pies Descalzos, and is a goodwill ambassador for UNICEF.
30
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
Chunosuke Matsuyama, a Japanese Seaman, sent a message in a bottle in 1784 that his ship had wrecked. It washed up in 1935 in the village where he was born.
15
More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17