Why do the north and south magnetic poles on the earth keep changing
On December 6, 1905, Norwegian explorer Amundsen explored the position of the north magnetic pole on King William Island. Interestingly, he discovered that this pole …
On December 6, 1905, Norwegian explorer Amundsen explored the position of the north magnetic pole on King William Island. Interestingly, he discovered that this pole …
People have known natural gas for a long time. The ancients began to boil salt with natural gas more than 2,000 years ago. However, this …
On December 28, 1895, the French Lumière brothers used their invented “moving movie machine” in a cafe in Paris to screen films such as “Train …
If you like birds, you will find a variety of bird beaks. The beak of a chicken is short and delicate, the beak of a …
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 …
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 …
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 …
As early as 100 years ago, people discovered that mosquitoes can transmit diseases. There are dozens of infectious diseases known to be transmitted by mosquitoes, …
There is a spherical virus with a diameter of 1 micron, but it has turned the human world upside down. It is the famous human …
In spring, the temperature gradually rises, and insects come out one after another. Some bite crops, some steal food, some bit humans and animals…At this …
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 …
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 …