NASA keeps looking for technosignature of alien intelligence.

SETI keeps going and searches for techno signatures. The AI and new sensors are the tools that researchers want to use in that search that can continue longer than a lifetime. Or the search ends tomorrow. The problem is that nobody knows what they searching for.

Searching techno signatures like Dyson's spheres and artificial pollution is different than trying to make contact with aliens. Technosignatures are passive signals like pollution, city lights, or radiation from power sources.

The extreme version of the techno signatures is the alien probe, that nobody confirms to keep in warehouses. The probes would be the first crafts that enter our solar system when hypothetical aliens are coming.

If there is a manned alien spacecraft. That travels in the universe, there would be a fleet of drones or probes traveling ahead of manned units. Those probes' purpose is to search for interesting targets for that hypothetical spacecraft and its crew. The craft would be extremely large. And every maneuver that it makes requires lots of energy.

And that means the crew will not break it without a good reason. In one vision the Kardachev Scale 3 civilizations and civilizations above that scale can send interstellar spacecrafts with living crews. And if that is true, our home planet is too primitive for those creatures.

"NASA is expanding its search for extraterrestrial life to include technosignatures, signs of advanced civilizations, beyond just radio signals. This includes artificial chemicals in exoplanet atmospheres, infrared signatures of megastructures, and potential city lights on distant planets". (ScitechDaily.com/Searching for Signs of Intelligent Life in the Universe: Technosignatures)

There is a hypothesis that the "little grey men" are actually robots. The sender of those robots is unknown. (Images: ScitechDaily.com/Searching for Signs of Intelligent Life in the Universe: Technosignatures)

There is always a risk. The microbes pollute craft if the aliens try to send manned recon crafts to search humans or if aliens themselves try to land on Earth. Those microbes can be even deadlier than any ebola because our hypothetical aliens have no immune resistance against Earth bacteria.

So to avoid that risk those hypothetical aliens will not stop in our solar system. And even if they would start to orbit our planet or any similar planet they will operate on the ground by using remote- or AI-controlled robots. The thing makes sure, that any infectious material can split in the alien mothership.

When we think about interstellar traveling the time dilation can keep the crew alive longer than usual. If the craft uses time dilation to keep the crew operational for an extremely long time, that means that the senders of the craft died a long time ago before the crew reached the other solar system. The craft can have a saucer shape, and there is a particle accelerator at its edge. The purpose of that system is to accelerate electrons or protons to a speed, that is close to speed of light.

That particle accelerator will make the time dilation in the cabin, and the speed of the craft would be 20-50% of the speed of light. Centuries and millenniums are traveling outside its shell, and the journey would be one way. The senders will not see those crew members anymore.

https://scitechdaily.com/searching-for-signs-of-intelligent-life-in-the-universe-technosignatures/

Use virtual "perpetual motion machines" and seawater as energy sources.

Use virtual "perpetual motion machines" and seawater as energy sources. The Archimedean screw can offer almost endless energy sources. "Robert Fludd's 1618 "water screw" perpetual motion machine from a 1660 wood engraving. It is widely credited as the first attempt to describe such a device." (Wikipedia/Perpetual motion) The term "virtual perpetual motion machine" means a machine. That pulls water to the upper tank using a capillary tube. Then that water will fall through the generator or turbine wheel. The machine uses differences in pressure levels. But it looks like a "perpetual motion machine", that is impossible because of laws of thermodynamics. The machine uses differences in pressure levels. But it looks like a " real perpetual motion machine", which is impossible because of the laws of thermodynamics. The real perpetual motion machines don't use outside energy. And that's why they are not possible.

Metamaterials can change their properties in an electric- or electro-optical field.

"Researchers have created a novel metamaterial that can dynamically tune its shape and properties in real-time, offering unprecedented adaptability for applications in robotics and smart materials. This development bridges the gap between current materials and the adaptability seen in nature, paving the way for the future of adaptive technologies. Credit: UNIST" (ScitechDaily, Metamaterial Magic: Scientists Develop New Material That Can Dynamically Tune Its Shape and Mechanical Properties in Real-Time) Metamaterials can change their properties in an electric- or electro-optical field. An electro-optical activator can also be an IR state, which means. The metamorphosis in the material can thermally activate. AI is the ultimate tool for metamaterial research. Metamaterials are nanotechnical- or quantum technical tools that can change their properties, like reflection or state from solid to liquid when the electric or optical effect hits that material. The metamaterial can cru

There might be an answer to why there is a gravitational hole in Earth's gravitational field.

The gravitational field at the point of the Indian Ocean is weaker than in other places on Earth. The existence of that gravitational hole is proved. But the reason why that gravitational hole is formed is unknown. The reason why the gravitational field on the Indian Ocean is weaker might be a simple thing. There is a possible lighter rock in the mantle, or there is less material at that point. In some wildest theories, there are bubbles in magma that turn below the bottom of the Indian Ocean are less massive than in other places on Earth. The lighter material at that point should make the hole in gravitation. "Geoid undulation in false color. (International Centre for Global Earth Models/Wikimedia, CC BY 4.0) The impact of the ancient planet. In the time when Earth was young. Cause asymmetry of Earth's gravitational field, because there still is the debris of that impact. But the hole in a gravitational field is harder to explain than regular-looking asymmetry. Could the r

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