Science
Progress and Obstacles to Resurrecting Prehistoric Organisms
Recent advances in genetic engineering and cloning have led to the idea of "resurrecting" animals that have been extinct in the past, but how far can we go? Hendrik Poyner, director of the Centre for Ancient DNA at McMaster University in Canada, and his research team succeeded this year in extracting the complete genome of the mammoth, an ancient animal that only appears in science fiction movies, for the first time, and published a report on it in the semiannual journal Current Biology. Poyner is excited to have access to the complete biological data of the long-extinct mammoth. He said, "Research has progressed rapidly in the last 10 years. I was involved in the first phase of this research as a student, and now I'm working on the second phase. I feel like I've become an old man in this field, even though I'm only 44 years old."
By Cindy Dory3 years ago in Earth
Greek whale strands dead, humans are to blame
There are some very special creatures in the ocean, such as whales. Although we call them whales, they are not real fish. Unlike fish, whales are aquatic mammals. That said, whales are viviparous and breathe with lungs, and they need to surface frequently for air. Because whales are so large that they cannot survive in shallow waters, these whales can be life-threatening if they become stranded on the coast. For example, on April 19, 2022, a huge sperm whale was stranded on the coast in the waters of Xiangshan County, Ningbo. Because the sperm whale was over 19 meters long and weighed 70 tons, it was very difficult to rescue the sperm whale. Fortunately, with the efforts of rescuers, the sperm whale stranded on the coast finally returned to the sea safely.
By suzanne darlene3 years ago in Earth
Scientists discover mysterious 'yellow brick road' at the bottom of the Pacific Ocean
The universe has existed for more than 13 billion years, the earth has existed for more than 4 billion years, and the earth has nurtured life for more than 3 billion years, while we humans have only existed for a few million years. So some people think that before the emergence of humans, there may have been prehistoric civilizations on the earth. We cannot find these prehistoric civilizations now. It may be that they have been destroyed, or they may have achieved interstellar immigration and left the earth.
By adalberto alejandrina3 years ago in Earth
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 mallen3 years ago in Earth
NASA spacesuit leaks again, how dangerous is it? There have been astronauts who nearly drowned
In our impression, the United States seems to spend money "big", to complete the Apollo manned lunar landing program, almost all the country's efforts, huge human, material, and financial resources, and finally, in 1969 the first manned lunar landing was completed. After the manned lunar landing program, the United States also manufactured a reusable space shuttle. It seems that the financial strength of the United States, but sometimes also to repair, a device with decades, for example, the United States is now using the spacesuit has been more than 40 years.
By Deljewitzki3 years ago in Earth
How terrible is reproductive isolation in nature?
The history of life on Earth is 4 billion years old, and countless species have evolved during this long evolutionary history of life. Due to genetic mutation, chromosomal variation, and genetic recombination, the original life has been differentiated into various branches on the path of evolution, resulting in new species and gradually forming a variety of creatures.
By Baudamolova3 years ago in Earth
Gas and Natural gas, what is the difference between them?
As the saying goes: open the door to seven things, firewood, rice, oil, salt, soy sauce, vinegar, and tea. As times change, the term firewood has become more and more unfamiliar to many friends who grew up in the city, the rural cook stove no longer exists, replaced by a variety of gas stoves and appliances. So what is the gas burning in the gas stove in the end? What is the difference between the gas, gas, and natural gas that we usually hear about?
By Deljewitzki3 years ago in Earth
Why does the sea rise and fall at high tide?
People who live by the sea know that seawater always goes in and out, and the sea surface has a rise and fall. At low tide, the seawater will gradually recede, the sea gradually backs down to reveal a large beach; at high tide, the seawater from the depths of the ocean will continue to surge up the coast, the waves roll, and the water level rises.
By Apostolakis3 years ago in Earth
A disaster is brewing? UN: An oil tanker may disintegrate
The rapid development of human society is inseparable from resources, especially energy, because without energy, all kinds of equipment cannot operate. Humans officially entered the oil age in 1867. In that year, the proportion of human consumption of oil accounted for 40.4% of the primary energy consumption structure of that year, exceeding 38.8% of coal.
By suzanne darlene3 years ago in Earth
