Science

When the Titanic was sunk by an iceberg, why didn't the people on board take refuge in the iceberg?
In 1912, the "unsinkable" Titanic sank at the bottom of the Atlantic Ocean on its first official voyage, making it the most tragic maritime disaster in human history in terms of casualties. In the sinking, 1,517 of the 2,224 crew members and passengers lost their lives forever.
By Deljewitzki3 years ago in Earth
The "UFO" has appeared again?
As many as 50 unidentified luminous objects appeared in the night sky of Japan, sparking speculation among many enthusiasts, did the UFOs appear again? Although we were not there, we can also imagine if so many luminous objects suddenly appeared in the night sky, that scene may be unforgettable, and may even make us feel some awe, because many people do not know what these luminous objects are in the end.
By Sukkning3 years ago in Earth
Humans do not have natural enemies?
I believe that on your side, there must be a lot of people who are afraid of snakes or insects, or you are one of them, although people have not been in direct contact with them, more than they have not been hurt, alone on the TV screen, goose bumps, scientists analyze, this should be our body was hidden in the "fear gene" effect The effect of these ancestors passed down the genes, can effectively help those who have not seen the natural enemy of the offspring avoid unknown harm.
By Fei Fei3 years ago in Earth
There are many "no-go areas for humans" in the world
There are many "human no-go areas" in the world, the so-called no-go areas that are forbidden to human exploration. Because of the area often mysterious things happen including death, disappearance, etc. Of course, there are some adventurers or archaeologists who have tried to enter the forbidden areas to explore and research, but the result is often the cost of losing their lives. China also has many forbidden areas, such as Lop Nor, but before Lop Nor is not a "human forbidden area", but a lake, and there are a large number of people living.
By Lu Da3 years ago in Earth
Temperatures so low they can't be measured! Only extreme low temperatures of one part per billion occur, and even lower
Temperature is a representation of matter and energy in the universe, which is reflected in the intensity of particle motion and is an indicator of how hot or cold an object is. We all know that there is a physical concept of "absolute zero", the temperature of minus 273.15 degrees Celsius, today scientists have been able to create more than 10 trillion degrees Celsius high temperature, but "absolute zero" is considered never reached, because to Absolute zero, the internal thermodynamic movement of matter will completely stop, which is extremely difficult to do, so the exploration of the lowest temperature is also a scientific challenge.
By Apostolakis3 years ago in Earth
Standing on Pluto looking at the Sun
At the TAU meeting in 2006, Pluto was removed from the list of planets in the solar system by a vote of astronomers and classified as a "dwarf planet" because it was too small! The removal of Pluto from the list of planets once caused discontent among the American public.
By Bar wall3 years ago in Earth
The smallest black hole in the universe
The black hole is an extremely mysterious object in the universe, it does not emit light, so we can not see its true face, and its gravity is extremely strong, all the matter close to its edge, will be torn apart and swallowed by it, but the good thing is that the known such objects are relatively distant from our solar system, will not affect the solar system.
By Stajila3 years ago in Earth
Tonga has another volcanic eruption, erupted eight times in two days but
Many friends should still be impressed by the January 15 eruption of the volcano in Tonga (specifically, the volcano in Tongan Hong Aha Apia), it is the world's largest eruption phenomenon in recent decades, and the level of the rare VIE-6 level, spewing lava ash and other materials up to 16 cubic kilometers (16 billion cubic meters), the column of ash smoke so high that you can not see the top, the sound of the explosion reached more than 1 More than 10,000 kilometers away, the resulting shock wave around the Earth ran four times and caused a sonic tsunami sweeping the entire Pacific Ocean, its power is comparable to the effect of thousands of Hiroshima atomic bomb explosion, resulting in the entire country of Tonga was once lost in the world, it is no exaggeration to say that its eruption let all mankind a deep appreciation of the majestic power from nature. It is no exaggeration to say that its eruption has made all mankind appreciate the majestic power of nature.
By Lu Da3 years ago in Earth
Sharks roaming the city streets
This year, most places in the northern hemisphere have experienced very rare hot weather, once so hot that even typhoons rarely appear. But after entering September, although the weather is still very hot, it is as if the floodgates of typhoons were suddenly opened, one after another appeared, the whole of September along the Pacific Northwest appeared 8 typhoons, respectively, Xian Lou, Chihuahua, Mia Ba, Madonna, Alas, Ola, Rose, Rock, a month appeared 8 typhoons, or very rare.
By Paul Weiest3 years ago in Earth
The reproductive organs of whales are hidden in the body
On today's planet, the largest animal in size is the blue whale, but the blue whale's eggs are not the largest. The right whale's eggs weigh 500 kilograms, 20 times heavier than the blue whale's eggs, making it the heaviest animal with the heaviest eggs in the world.
By Bar wall3 years ago in Earth
Archaeologists recovered a 600-year-old man's appearance, which does not resemble a modern man
Human looks are influenced not only by genetics but also by the environment in which they live. Many people may think that people like Anonymous Man (about 1.7 million years ago) and Caveman (about 30,000 years ago), who are very far away from us, do not look like modern people as a matter of course, but people from hundreds of years ago should look just like modern people, right?
By Baudamolova3 years ago in Earth
Reproductive competition is ubiquitous in nature
Reproductive competition is ubiquitous. There is a competition that we can see, for example, male lions fight for the right to mate with lionesses; there is also a competition that we cannot see, for example, sperm competition.
By Bar wall3 years ago in Earth