Robert Jack
Bio
One of the secrets of emotional stability for adults is to keep the expectations of others to a minimum.
Stories (70/0)
Two billion-year-old nuclear reactor
Prehistoric civilizations have always been a topic of fascination, and no wonder, after all, humans have been on Earth for so short a time in its history that if the history of the planet were compressed into a single day, humans would have appeared in the last two minutes of that day. In the past, there have been frequent claims of the discovery of suspected prehistoric civilizations, the most notable of which would be a two-billion-year-old nuclear reactor.
By Robert Jack2 years ago in Earth
10 billion times harder than steel
From a microscopic point of view, the objects we normally see are actually made up of a large number of atoms, and the hardness of the objects varies greatly depending on the type of atom and the way it is bonded, for example, a diamond is made up entirely of carbon atoms, and the way it is bonded is that each carbon atom is bonded to the four carbon atoms next to it through covalent bonds, thus forming a crystal structure like the one shown below.
By Robert Jack2 years ago in Earth
Where is the solar system located in the galaxy?
The sun, the moon, and the stars were once proudly thought to be centered on the earth, but the emergence of the heliocentric theory has poured cold water on mankind, and now we all know that the sun's position in the universe is not special, it is just an ordinary star in the huge galaxy of the Milky Way. Where in the galaxy?
By Robert Jack2 years ago in Earth
A mysterious force
The greatest reward of human beings in the process of exploring the universe is to know their smallness and ignorance, such a statement is not particularly exaggerated, because there are indeed many phenomena in the universe that human beings cannot understand, for example, human beings have long discovered that there is a mysterious force in the universe that controls the operation of the universe, but until now, human beings still know almost nothing about it.
By Robert Jack2 years ago in Earth
The 2nd closest star to the Sun
If someone asks which is the closest star to the Sun? I believe that if you are a lover of astronomy, you can immediately give the answer, and if not surprisingly, you can even say that the distance between this star and the Sun is about 4.22 light years, but if you ask which is the second closest star to the Sun? That's not easy to answer.
By Robert Jack2 years ago in Earth
How long does it take to go to Mars?
In the vast universe, the Earth is as small as dust, of course, mankind is not willing to stay on Earth, a few decades ago mankind has personally on the moon, the next step should be to go to a more distant planet sneak, to which planet is good?
By Robert Jack2 years ago in Earth
extraterrestrial civilization
If someone asks if there is an extraterrestrial civilization in the universe, I believe most people will give a positive answer. It is also widely believed in the scientific community that there should be extraterrestrial civilizations in the universe, and they are quite numerous.
By Robert Jack2 years ago in Earth
"State of Chaos"
Past studies have shown that past shifts in Earth's climate patterns have usually been driven by external factors, such as super volcanic eruptions, impacts of small bodies, solar activity, or changes in the Earth's orbit. This has never happened on Earth in the past.
By Robert Jack2 years ago in Earth
If evolution is correct
The modern evolutionary theory believes that all existing organisms on the earth are those primitive beings that evolved over a long period, and in the process of evolution, due to the existence of genetic mutations, organisms will undergo some subtle changes from time to time in the process of reproduction from generation to generation. If some changes are conducive to better survival and reproduction, then these changes will pass the test of "natural selection" and be preserved and passed on from generation to generation, while the other way around, they will be eliminated by "natural selection".
By Robert Jack2 years ago in Earth
Earth has more than 8,000 meters high mountains
The Earth is round, this is a scientific common sense known to modern mankind, so how round is the Earth in the end? The answer given by scientists is that the Earth is very round and can be said to be a near-perfect sphere.
By Robert Jack2 years ago in Earth
A failed lunar exploration
As the closest planet to Earth, the Moon has rightly become a key exploration target for humans, and in the past, humans have launched a large number of probes to the Moon, although humans do not always succeed in launching probes to the Moon, for example, in 2019, there was a mission to the Moon that failed.
By Robert Jack2 years ago in Earth
