A Wonderful World
Nature is a teacher of human beings and a wonderful world.
Nature is a teacher of human beings and a wonderful world.
Today, I'll introduce you to a species of aquatic animal - jellyfish. Jellyfish, also known as sea jelly, is a very ancient cavernous animal that floated in the ocean as early as 500 million years ago. This low-level animal has the instinct to predict storms, whenever the storm before it swims to the sea to take refuge.
Bionics has discovered that the jellyfish has a thin stalk in its resonant cavity, with a small ball on the stalk and a small listening stone inside the ball. The jellyfish heard the "rumble" of the approaching storm when the infrasound hit the jellyfish's hearing stone, which stimulated the nerve receptors on the wall of the ball.
In the simulation of jellyfish feel infrasound organs, scientists have designed a "jellyfish ear" instrument, which can be about 15 hours in advance of the forecast storm. It consists of a horn, and resonators to receive infrasound and transform this vibration into an electrical pulse converter and indicator.
This instrument is mounted on the foredeck of the ship, and the horn does a 360° rotation. When it receives 8 Hz - 13 Hz infrasound, the rotation automatically stops, and the direction indicated by the horn is the direction of the approaching storm. The indicator can also tell people the strength of the storm. This is important for navigation and fishing production.
Jellyfish is a storm predictor. Nature is a good teacher for human beings!
I bought six small jellyfish from Liu Gong Island. Some of them are big, some are small, some have long tentacles, and some have short tentacles. But they all have one common feature, that is, they have no mouth, no arms and legs, no brain, no eyes, no nose, and all the tentacles have hair on them. Some of these six little jellyfish love to play and some love to sleep, just like a long-legged little mushroom wearing a stealth suit.
When they move together, it is like a hot air balloon swelling up, stretching, and shrinking aimlessly swimming. It also seems to be a fairy swimming in a small river, beautiful. But jellyfish have no mouth, no eyes, no brain, so what do they eat?
Later, I learned from the Internet that jellyfish feed on plankton in the water. Their tentacles are their cavity intestines. When plankton touches their tentacles, the tentacles shoot out poisonous juice, which first poisons them to death, and then the cavity intestines break them down and digest them directly.
Jellyfish are amazing creatures, and it's great insight!
In nature, there are many animals, plants, and microorganisms that give us revelations, and jellyfish are one of them.
The jellyfish was originally a creature that posed a threat to human life. It can extend its tentacles 50 feet. If a human touches its tentacles, the skin is left with many red streaks, as if it had been whipped. Once the severe pain from the wound spreads to the chest, the injured person's heart will stop.
Look! The jellyfish is so scary, but it has taught mankind many lessons.
The jellyfish has an "ear" in its tentacle cluster, which contains a small stone called a hearing stone. When the infrasound waves and air friction to the jellyfish's "ears", the hearing stone will be vibration to the jellyfish's ear wall of the nerve receptors. The jellyfish will be able to take precautions fifteen hours in advance: it will release all the air in the sac and sink to the bottom.
Scientists invented an instrument called the "jellyfish ear storm predictor" based on this principle. People installed this instrument on the ship, it can be instructed on the screen according to the intensity of the storm and the direction of the storm, in advance of the ship into the harbor to avoid the storm.
This invention is of great help to fisheries and weather.
See how amazing nature is!
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Breath-taking beauty
Where there is soil, there is dandelion, that's what Puyu told me. I also kept it in my mind. The first time I heard this name, I was a little surprised that there was a Pope. I thought I could only see such a special name in fiction. The first time I heard this name, I was a little surprised that there was a person with the surname Pu Yu. She just smiled faintly at me, quiet and nice, I ignored her and went on to sleep my sleep. She was a little embarrassed, and a boy in front of me said, "Don't pay any attention to her, she's a little weird." I did not respond, Puyu then asked: "How strange?" The boy said, "I can't say, behavior is a bit misbehaved, in addition to can draw nothing, and, her parents divorced three years ago ......"
By Mary J Long3 years ago in Earth
Greenland: New Shipping Routes, Hidden Minerals – and a Frontline Between the US and Russia?
Once seen as a remote and largely isolated Arctic territory, Greenland is rapidly emerging as a focal point of global geopolitics. Climate change, melting ice, and technological advances are transforming the island into a strategic hub defined by new shipping routes, vast mineral resources, and growing rivalry between major powers, particularly the United States and Russia. As the Arctic opens up, Greenland’s geographic position and untapped potential are pushing it to the center of international attention, raising questions about security, sovereignty, and sustainable development. Melting Ice and the Opening of New Shipping Routes One of the most visible impacts of climate change in the Arctic is the reduction of sea ice, which is making previously inaccessible waters navigable for longer periods each year. New Arctic shipping routes, including passages near Greenland, promise shorter travel times between Europe, Asia, and North America. Compared to traditional routes like the Suez Canal, Arctic pathways can reduce shipping distances by thousands of kilometers, cutting fuel costs and emissions. For global trade, this could be transformative. Greenland’s coastal waters are increasingly important as potential transit corridors and support hubs for these routes. However, the expansion of Arctic shipping also raises concerns about environmental risks, maritime safety, and the lack of robust emergency infrastructure in the region. Hidden Mineral Wealth Beneath the Ice Beyond shipping, Greenland holds significant reserves of critical minerals, many of which are essential for modern technologies and the global energy transition. These include rare earth elements, lithium, graphite, uranium, and other strategic resources used in electric vehicles, wind turbines, batteries, and defense systems. As demand for these materials grows, Greenland is being viewed as a potential alternative to existing supply chains dominated by a small number of countries. This has increased interest from Western governments seeking to diversify mineral sourcing and reduce strategic dependencies. However, mining in Greenland is controversial. Local communities and policymakers must balance economic opportunities with environmental protection and cultural preservation. Greenland’s harsh climate and fragile ecosystems make resource extraction both technically challenging and politically sensitive. The United States’ Strategic Interest in Greenland The United States has long considered Greenland strategically vital, largely due to its location between North America and Europe. The US already maintains a military presence at Pituffik Space Base (formerly Thule Air Base), which plays a key role in missile warning systems and space surveillance. In recent years, Washington has renewed its focus on Greenland, emphasizing Arctic security, infrastructure investment, and cooperation with Denmark, which oversees Greenland’s foreign and defense policy. US interest is driven by several factors: protecting transatlantic security routes, countering rival powers in the Arctic, and ensuring access to critical minerals. Greenland is increasingly viewed as a frontline in maintaining Western influence in the High North. Russia’s Arctic Ambitions Russia, meanwhile, sees the Arctic as central to its economic and military strategy. It has invested heavily in Arctic military bases, icebreaker fleets, and energy projects, particularly along its northern coastline. Although Greenland is geographically distant from Russia’s main Arctic territories, Moscow closely monitors developments there. The island’s proximity to key Arctic sea lanes and North Atlantic routes makes it strategically relevant in any broader confrontation between Russia and NATO. As tensions between Russia and the West remain high, Greenland’s location places it near the intersection of competing security interests, increasing its geopolitical significance. Greenland Between Global Powers The growing attention from major powers puts Greenland in a delicate position. While the island seeks greater economic independence and development, it must navigate complex relationships with Denmark, the United States, and other international actors. Greenland’s government has emphasized the importance of maintaining control over its resources and ensuring that development benefits local populations. At the same time, geopolitical competition risks turning Greenland into a strategic chessboard rather than a partner in decision-making. This balancing act is becoming more difficult as Arctic competition intensifies. Environmental and Social Challenges Greenland is on the front lines of climate change. Melting ice sheets contribute to global sea-level rise, while local communities face changes to traditional livelihoods such as fishing and hunting. The expansion of shipping and mining could bring jobs and infrastructure, but it also threatens fragile ecosystems and raises concerns about pollution, habitat disruption, and long-term sustainability. Any future development in Greenland will require careful regulation, international cooperation, and meaningful engagement
By Aarif Lashari4 days ago in Earth
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