The earliest human species
The earliest humans evolved from East Africa about 2.5 million years ago. The ancestor was an earlier ape genus "Australopithecus" (Australopithecus). About 2 million years ago, these ancient humans
Some have left their homes and embarked on a journey, covering vast areas of North Africa, Europe and Asia. The forests of Northern Europe are covered with snow, and the tropical forests of Indonesia are evaporating.
Green water, green mountains, blue sky and white clouds, and colors make this world more beautiful. The human eye has the ability to perceive colors, so it can appreciate this colorful world. The sky is usually blue and the clouds are usually white. So why are they in this color? Why can't the sky be green and the clouds can't be blue?
Deformation is the source of force
First of all, we need to know why the bridge was destroyed? In fact, the key lies in deformation. All objects in our macroscopic world will deform when subjected to force. Although some materials are very hard and the deformation is so small that it is almost imperceptible, it can still be observed as long as the experimental instruments are sufficiently precise.
Mankind has been exploring Mars for more than 40 years. This red planet is the first exoplanet that mankind knows best. Let’s take a look at some unsolved mysteries about Mars.
60 million years ago, an asteroid hit the earth, causing mass extinction of living things and ending the 160 million-year history of dinosaurs dominating the earth. This planetary impact event has caused mammals to appear one after another, until today, we humans have become the masters of the earth. Dinosaurs, once masters of the earth, took 160 million years to paint a magnificent geological picture of the "dinosaur world". This magnificent picture painted in blood shows us the cruelty of nature and fierce competition hundreds of millions of years ago. Survival and inheritance in blood and fire also constituted this legend.
Electricity is a phenomenon produced by static or moving electric charges. Electric currents are formed when electric charges move in a conductor. Why is the current divided into AC and DC? This is not divided subjectively, but divided according to the characteristics of different currents. The most intuitive manifestation is the difference in current waveforms.
How is gravity produced, or what is the nature of gravity?
At present, the mainstream view in the scientific community believes that the essence of gravity is the curvature of space-time. This view comes from Einstein's general theory of relativity, which has been confirmed by many astronomical observations, and it also plays a good role in theoretical prediction.
The universe has twelve dimensions, from dense, low-frequency, low-dimensionality upward to light, high-frequency, high-dimensionality. There is no longer material existence in the high dimension, it is the existence of intangible light with high intelligence and creativity!
Mathematics is not very good, and I can't express it with mathematics, which also cannot stop my interest in time.
We are all familiar with it. Now we use mobile phones. It is very convenient to check the time. When is the time, we know the time when we look at the mobile phone.
The Pythagoreans or The Italians were a group of philosophers who belonged to an ancient sect that brought forward the Pythagorean tradition and doctrines, which in turn brought developments in the fields of science, religion and philosophy. Among the Pythagoreans, such as Hippasus, Petron, Ecphantus, Hicetas, Philolaus, Archytas; Pythagoras is the most familiar and well known, who was a mathematician, religious and cultural leader, a Guru and a philosopher.
Last week the committee of Nobel Prize in chemistry announced the 2020 winners of the most prestigious scientific award.
A Horseshoe crab is a marine arthropod. Contrary to their name, they are not crabs at all. In fact, the Horseshoe crab is actually more closely related to spiders than they are crabs.