Prehistoric civilization have always been the talk of the town, and it's no wonder - after all, humans have been around for so short a time in the history of the planet that if we were to compress the history of the planet into a single day, then humans would probably only appear in the last two minutes of that day. In the past, there have been frequent claims of the discovery of suspected prehistoric civilization, the most notable of which would be a two-billion-year-old nuclear reactor.
"Lion"
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Extraterrestrial
The Solar System Moves 7 Billion Kilometres a Year, But The North Star Is Always Due North - Why Is That?
In our universe, whether as large as a galaxy or as small as an electron, we are always in motion, and even when we think we are sitting motionless in our chairs, the earth is carrying us around the sun at a speed of about 30 kilometres per second, and the sun is also in motion, in fact it is carrying the entire solar system around the centre of the milky way, and at a speed of about 220 kilometres per second.
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Tigers usually rest on the ground. As tigers living in temperate zones, the ability to keep their abdomen warm in winter is a critical factor, so the Northeast tiger has the longest abdominal hair among all tiger subspecies.
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Biology
On The Road To Evolution, The Acacia Tree And The Giraffe Have Been Fighting Each Other For Millions Of Years
The length of the giraffe's tongue can reach more than 40 cm, usually, they only need to use their flexible tongue to avoid the hard thorns of the acacia tree, and then gently roll, you can eat the leaves
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Extraterrestrial
A Probe That Flew 22.8 Billion Kilometres And Finally Sent Back Pictures That Teach Mankind a Vivid Lesson
Although the Earth is just a "grain of dust suspended in the sun" in the universe, for us humans, this "grain of dust" is irreplaceable.
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Earth
Scientists Open 5.5 Million-Year-Old Cave, Discover 'Alien World', Overturning The Perception Of Life
In this 5.5 million-year-old cave, not only is there no sunlight, but the environment is also very harsh
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Extraterrestrial
18.8 Billion Kilometres Away, Seven Months Out Of Control, Voyager 2 Sends a Message To Earth: Hello
It's good news that Earth has regained contact with Voyager 2 after such a long period of loss of control. But somewhat sadly, Voyager 2 is carrying very little battery power left
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The 500 trillion ton comet was discovered in 2010 by astronomers Pedro Bernardinelli and Gary Bernstein
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Extraterrestrial
Having Flown 23 Billion Kilometers, This Photo Of Voyager 1 Is Thought-Provoking: Is Earth a "Zoo"?
At the time of the "family photo" of the solar system, the Voyager 1 probe has reached a distance of 6.4 billion kilometers from Earth, very distant, so in the view of the Voyager 1 probe, the solar system, the major celestial bodies are very small
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Earth
Has The Earth Used Less Water For More Than 4 Billion Years? Scientists Find The Answer In a Rock
The modern Earth's atmosphere is so rich in oxygen that the vast majority of this hydrogen will be re-oxidized to water without escaping from the Earth's top atmosphere