13 interesting facts in life not everyone knows

Human saliva contains an addictive substance, avocados never self-ripen on the tree, cats can also allergic to humans . are interesting facts in everyday life that not everyone knows.

1. Children's taste buds do not yet recognize the sweetness clearly, so they usually eat more sugar. When bones stop growing, human tastes become more noticeable.

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2. Human saliva contains an addictive substance 6 times stronger than morphine, called opiorphin.

3. Up to now, we have only discovered 4% of matter in the universe, the remaining 96% are dark matter.

4. If humans stood on galaxy M100 55 million light-years from Earth and used a state-of-the-art observation device to look at the Earth, only images during the extinction of the dinosaurs could be seen.

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5. Excluding images, the English language content on wikipedia alone accounts for about 14GB.

6. The human stomach and esophagus have more than 100 million nerve cells, more than neurons in cats' brains. Therefore, they are considered the "second brain" of humans.

7. Scientists think that creatures will live until their heart beats to 1 billion beats. However, thanks to the development of medicine, humanity is gradually surpassing this limit.

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8. An ancestor of the penguin that lived on Seymour Island 40 million years ago and was over 1m75 tall and weighed nearly 100kg.

9. Avocado doesn't ripen on its own, so people usually pick it when they want to sell.

10. Celcius degrees (degrees C) and degrees Fahrenheit (degrees F) are temperature units with the formula to convert from Celsius to Fahrenheit most memorable is F = 1.8 * C +32. Interestingly, minus 40 degrees Fahrenheit is exactly minus 40 degrees C.

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11. Due to climate change, the increase in the Earth's temperature, it is not possible that by 2050, cacao trees can survive. This means that there may be no cocoa left to make chocolate.

12. We often hear that someone is allergic to cats, but the fact that cats are less likely to be allergic to humans is less commonly known.

13. Dust in the house is not from dead cells in the body as many people still think, in fact they are brought by people from the street.

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