Science
Talking about "A Brief History of Humanity": When the labels are stripped off, and pure life is left, who are we?
The first few chapters of the book "A Brief History of Humanity" are somewhat unexpected. In my impression, our ancestors, Homo sapiens, were struggling and hungry in nature, just like in "Crazy Primitives" In the same way, everyone fought against large carnivores with stones in order to protect themselves, and it was miserable. But the authors point out a key point. Whenever Homo sapiens moved to a new continent, the local large mammals and birds began to die off a cliff.
By daron mychal3 years ago in Earth
New Zealand sheep farting, causing global warming? Experts adjust feed and breeding to cultivate little fart sheep
The dangers of global warming Yesterday, the US Environmental Protection Agency released the results of a study that confirmed for the first time that human activity is also part of the cause of global warming. Global warming has severely affected Earth's ecosystems, human security, housing and health.
By daron mychal3 years ago in Earth
Is it useless to seal the sarcophagus? More neutrons, nuclear fission strengthens, Chernobyl may explode again
Fission reactions surge in concrete sarcophagus at Chernobyl nuclear power plant, risking another explosion. Thirty-five years after the nuclear accident, the number of neutrons picked up by on-site sensors has increased dramatically, a signal of fission that scientists have reason to believe is at risk of another runaway nuclear reaction. Scientists are evaluating the problem, however, and no alarm has been issued yet.
By daron mychal3 years ago in Earth
You don't need to kill animals to eat meat. Do you eat artificial meat? Scientists: More nutritious and healthy!
Many of my friends are carnivores. It can be said that there is no love for meat, and the essential amino acids needed by our body are also provided by meat, which is one of the reasons why people love meat. However, although people like to eat meat, it is very unbearable to mention slaughtering animals, so that many animal protectionists can only eat meat with tears.
By daron mychal3 years ago in Earth
Astrophysicists use mysterious wobble in Saturn's rings to study Saturn's core
What's in a gas giant? The interiors of Jupiter and Saturn are actually very difficult to probe. But Saturn's unique ring system has proven to be an excellent tool for calculating the density beneath its thick clouds, all the way to the core.
By daron mychal3 years ago in Earth
The latest cold knowledge: shark navigation cheats, it turns out that the earth's magnetic field is its compass
Now that everyone is going to travel abroad, as long as they have a mobile phone, they will basically not get lost, because now there are navigation maps on mobile phones. Relying on satellite positioning, we can easily and quickly know where we are.
By suzanne darlene3 years ago in Earth
How did the virus in chimpanzees spread AIDS to black Africans and then to the world?
Every December 1st is "World AIDS Day". On this day, international organizations in various countries will be called on to hold activities related to it, to publicize and popularize the knowledge of AIDS and how to prevent AIDS. Although today is not "World AIDS Day", I hope that through this article, I can popularize the danger of AIDS to everyone.
By suzanne darlene3 years ago in Earth
Has advanced civilization appeared? Mysterious rings appear in the universe, scientists don't know how to explain
Human beings cannot be the only intelligent creatures in the universe in any respect, and as far as we know, the universe has existed for at least tens of billions of years, so a reasonable speculation is that there may well exist in the universe Advanced civilizations that are hundreds of millions or even billions of years ahead of human beings, if this is the case, their technological level is simply impossible for us humans to imagine.
By suzanne darlene3 years ago in Earth
Looking at the Earth from 2000 light years away
In the city, on the streets, there are crowds of people, people are busy passing by, and vehicles are running back and forth. Buses, high-speed trains, and airplanes are accustomed means of transportation, speeding by on their respective tracks. We are accustomed to it, but we do not know that these seemingly ordinary objects move, but they have changed our space-time structure. The small changes in , are not enough to make our senses feel. These changes are usually at the level of Planck's constant, which is 6.626*10^-34, followed by 34 0s after the decimal point. It can be said that the small ones are ignored. .
By suzanne darlene3 years ago in Earth
Breathtakingly beautiful distant galaxies in deep space
On a summer night, there is a cool breeze. When you look up at the starry sky, you can find bright starlight from 28 million light-years away in the direction of the Virgo galaxy cluster. If you borrow the lenses of the "Spitzer" space telescope, You will see this stunning picture:
By suzanne darlene3 years ago in Earth
Shaking for 200 million years, the life cycle is only one day, the life and death are talking about the mayfly
There is such a sentence in Su Shi's "Red Cliff": "A mayfly is sent to heaven and earth, and it is a drop in the vast ocean." Su Shi compared himself to a mayfly between heaven and earth, thinking that between heaven and earth, he is only like a The corn is so small that it is not worth mentioning.
By suzanne darlene3 years ago in Earth
