sondra mallen
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Share a little bit of science every day
Stories (65/0)
Mysterious islands in the South Pacific appear and disappear
There are many large and small islands on the earth, and some islands are far away from people and may not be known by too many people or visited by too many people. However, with the advancement of human technology, we do not necessarily have to visit the scene to see the islands far away from humans. With the help of various aircraft or satellites, we can actually get some pictures of the islands. Especially in front of high-resolution satellites, those islands can be said to be nowhere to hide. However, some situations are quite strange. Some islands appear on the satellite map, but when we go to the scene, we cannot find these islands. What is going on?
By sondra mallen2 years ago in Earth
Scientists are terrified of the situation of the US Mars helicopter
Although Mars also has an atmosphere, the density of Mars' atmosphere is very low, only about 1% of that of Earth, which means that the air on Mars is very thin, and we can't breathe if we stand directly on the surface of Mars. It is also because the atmospheric density of Mars is very low that it is more difficult for those rotorcraft to take off on the surface of Mars. Not only the take-off weight of the rotorcraft will be limited, but also the rotational speed of the rotor is very high.
By sondra mallen2 years ago in Earth
The most tragic aerospace tragedy: 7 astronauts vaporized in an instant!
Manned spaceflight is a challenging thing. In the early days of human manned spaceflight, there have been many accidents. Some accidents could have been avoided, but due to various reasons, accidents occurred. One of the more famous examples is the Soyuz 1 spacecraft, which was flown by former Soviet cosmonaut Vladimir Mikhailovich Komarov. Before he set off, Komarov knew that the spacecraft had as many as 203 structural problems that could prevent him from returning to the mission.
By sondra mallen2 years ago in Earth
Can leeches survive in chickens?
Since ancient times, blood-sucking creatures have been terrifying. Leeches are soft, elongated, and a little disgusting when they wriggle. Coupled with the blessings of various folk legends, leeches are definitely what I fear the most. one.
By sondra mallen2 years ago in Earth
Why did snakes evolve their legs, and is it really more advantageous to walk on their stomachs?
Snakes are one of the coldest killers in nature. They are natural hunting machines. They use spitting letters to analyze chemicals in the air, and they use the ground to sense the vibrations brought by prey and predators. Some snakes even have infrared sensing capabilities. The body temperature of the prey can also be sensed in the absence of light.
By sondra mallen2 years ago in Earth
Why do springs never stop flowing all year round?
If you have lived in the mountains in the south, you will find that some springs in the mountains are really like endless water, which will not stop all year round, and the temperature is constant. Originated from these springs.
By sondra mallen2 years ago in Earth
Two-headed snakes frequently appear in Yuhang, Hangzhou, is it really an ominous sign?
In the early morning of the day before yesterday, a resident of Yuhang, Hangzhou, was walking by the pond and found a "strange guy" - a "fish" with four legs. He caught the weird guy and kept it in a white storage tank. in the box.
By sondra mallen2 years ago in Earth