Why the comet looks big
From the perspective of the people on earth, the sun is really an incredibly large celestial body, its size is as big as 1.3 million …
Category: Knowledge
Why vaccinate?
Vaccination is one of the most economical and effective methods to prevent and control infectious diseases. Vaccination can enhance the body’s immunity, improve its own …
Why are children easy to get pneumonia?
In outpatients, more than 60% of children suffer from acute respiratory infections; in emergency rooms, this proportion will increase by 10% to 20%; among hospitalized …
What are the two dark clouds above classical physics?
The brilliant achievements of classical physics also talked about how great Newton really is. Finally, we also said that at the end of the 19th …
What was discovered at the bottom of the Pacific Ocean that should not have existed 6.3 million years ago?
The Pacific Ocean is the largest and deepest ocean on the earth. Its area occupies one-third of the earth’s surface, with an average depth of …
The worst drought in 1200 years will come, 2021: How much suffering will humanity suffer?
On May 11, 2021, watchers.news (Observer Network) reported that the U.S. Federal Drought Monitoring Map showed that most areas of California’s San Francisco Bay Area …
Australian mysterious worm, why has more than 100 butts? Expert: For mating
In nature, most animals have a head and limbs, some animals have tails, and some animals do not. If some animals do not grow according …
If you see straight lightning, you might be the first person to observe dark matter?
Since the dark matter theory was proposed, scientists have been exploring this mysterious matter for decades, and various complex detectors built on the earth have …
How does Planck solve the blackbody radiation problem?
Since the problem of blackbody radiation directly led to the beginning of the old quantum theory, we also emphasized, why do people study blackbody radiation? …
It was abnormal before the earthquake! What’s going on, creatures really have the ability to “predict earthquakes”?
“The large-scale fish in the pool is jumping”, “the pigs in the pigpen are jumping out”, “chickens and ducks are running and wandering everywhere”, “dogs …
How long can a person sleep at a time under extreme fatigue?
Many friends have this experience, because work requires a few days of continuous overnight, and then the next thing is to sleep in the dark …
If someone flies into the universe at the speed of light and returns to Earth one day later, can he still see his family?
Although the level of human science and technology is limited, we can conduct thought experiments that cannot be achieved in reality based on our imagination. …