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UFO flies over the earth at the speed of light, can humans see it?
If UFO flies over the earth at the speed of light, the time is short, greater than the speed of light propagation, can humans see it?
The universe is so big, how can humans find extraterrestrial life?
The universe is so big, only us with advanced life? It seems unlikely. With the advancement of science and technology, how should humans look for extraterrestrial life?
The last jump picture of the girl who lost the wingsuit flight was revealed, how many wingswing flights ...
Tianmenshan winged flight lost the girl's last jump screen was revealed, the flight was out of control in 19 seconds, and the speed dropped hundreds of meters in just a few seconds. The photographer signaled the other party to open the parachute and did not get a response. How dangerous is winged flight?
Is there still ancient dinosaurs in the ocean?
Dinosaurs have crocodile noses and nostrils, but are considered to be unable to enter the water. The new fossil model of Spinosaurus proves that dinosaurs may be "swimming swimmers". Will there be dinosaurs in the ocean?
Planet 9 of the solar system is actually an original black hole?
Planet 9 has always had a huge gravitational effect, but it has not been observed for a long time. Perhaps Planet 9 in the solar system is a black hole!
Why don't alien civilization take the initiative to contact the earth?
Earth is constantly trying to get in touch with alien civilizations, why doesn't advanced alien civilizations take the initiative to contact the earth?
Why are supermassive black holes so mysterious?
Supermassive black holes are formed in the early stage of the universe, and are more docile and mysterious than ordinary black holes. 90% of the supermassive black holes in the center of the galaxy are dormant, which is "spiritual"!
Why launch a spacecraft in the ocean?
The abnormal vibration of the sound is a key factor to be considered for rocket launch. Launching a spacecraft in the ocean saves land space, and can also reduce the impact of noise and improve the success rate of rocket launch!
26 kg lunar meteorite, why is it worth 2.5 million US dollars?
Christie's released a rare product-26 kg of lunar meteorites. This is the fifth largest lunar meteorite on earth, and the final transaction price is 2.5 million US dollars!
Compress the earth into peanuts, can it reach a black hole?
A celestial body smaller than the Schwarzschild radius will collapse into a black hole. Compress the earth to the size of a peanut, you can get a black hole!
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