9 interesting popular science tips
1, a spoonful of neutron star material weighs 6 billion tons.
It is estimated that there are about10 billion neutron stars in our galaxy. The mass of these stars is about 1.3-2.5 times that of our sun. Neutron stars contain the densest known matter that can be directly observed. A spoonful of neutron star material weighs an exaggerated 6 billion tons, which is about the weight of Mount Everest. The pressure in the core of a star is so high that most charged particles, electrons and protons fuse together to form a star, which is mainly composed of uncharged particles called neutrons.
Chalk consists of trillions of tiny plankton fossils.
Chalk is made of lime slag, but what many people don't know is that lime slag is formed by the microscopic skeleton of plankton. In fact, tiny unicellular algae called coccidiosis have lived in the oceans of the earth for 200 million years. Unlike other marine plants, they are covered with calcite. Just 1 100 million years ago, a stone gathered on the seabed covered with a thick layer of white mud, and the conditions were just right. As more sediments accumulate at the top, pressure compresses chondrites to form rocks, forming chalk sediments. This stone is just one of many prehistoric species preserved in fossil form.
It takes 8 minutes 19 seconds for light to travel from the sun to the earth.
In space, the speed of light reaches 300,000 kilometers per second. Even though this speed sounds amazing, it will take a lot of time to cross the odd distance of 65.438+0.5 billion kilometers between us and the sun. However, compared with the five and a half hours that sunlight takes to reach Pluto, the eight-minute time that sunlight takes to reach the Earth is actually very short.
Drinking too much coffee may make your breasts smaller.
An interesting study published in the British Journal of Cancer seems to be bad news for women who love coffee. This study investigated the daily coffee intake of more than 300 women and found that the breasts of women who drink three or more cups of coffee a day are smaller than those of women who don't drink three cups of coffee 17%. The researchers said that all this can be summed up as follows: too much caffeine will affect human hormones, thus affecting the size of women's breasts.
The average height of Indonesians is the shortest in the world.
According to the data collected by different sources in the British Telegraph in 20 17, although there are differences in height in any country or region, on average, the population height in Indonesia is the shortest in the world. The average height of adults is about 157cm. The average height is the highest in the Netherlands, with the average adult height 180cm.
The longest place name on the planet has 85 letters.
People living in Mamungkukumpurangkuntjunya Mountain in Australia need great patience when learning to spell the name of their hometown. But in fact, it is not the worst, because the longest name in the world is located in New Zealand, and it has 85 letters: taumatawahakatangha-Koauauotamateaturari Pukapimakimang-Ahoronukupokai Whenuakitanatahu.
7. If all the spaces in human atoms are excluded, then all human beings can fit into the volume of cube sugar.
The atoms that make up us look solid, but in fact more than 99.99999% of the space is empty. An atom is composed of a small and dense nucleus and a large number of electrons around it, which are distributed in a wide area in proportion. This is because electrons are not only particles, but also behave like waves. Electrons can only exist where the peaks and valleys of these waves are correctly superimposed. Moreover, the position of each electron is not distributed in a point, but in a probability range. So they take up a lot of space.
Fleas accelerate faster than the space shuttle.
A jumping flea can reach a dizzying height of 8 cm in a millisecond, and its speed is even more than 20 times faster than that of the space shuttle. The reason why fleas have such magical power lies in an elastic rubber-like protein, which can store and release energy like a spring.
9. Giving birth to boys and girls depends more on men's genes.
Corey Gelatelli, a research scientist at Newcastle University in England, conducted a study involving 927 genealogies. According to the research results, male genes play a very important role in giving birth to boys and girls. The conclusion is that if a man's parents have more sons, he is more likely to have sons. On the contrary, if most of his parents are daughters, he is more likely to have daughters. This ability seems to be hereditary and seems to be related only to men.
Nine interesting short articles on popular science knowledge:
1. Interesting selection of popular science knowledge
2. Interesting scientific knowledge
3.50 interesting scientific tips and questions
4. Popular science knowledge
5. The origin of speed reading is simple.
6. 15 popular science knowledge that primary school students must know.
7. 50 science tips around primary school students
8. Common sense and popular science knowledge
9. What little knowledge of earth science is there?