Will Earth become Mars in the future?
Astronomers have found that every 110 million years, the sun's brightness increases by 1%, so in the long run, the earth's temperature will inevitably rise, and the earth's climate will become uninhabitable in as soon as 1 billion years, and in 2 billion years all water will evaporate, and the earth will turn from blue to earthy yellow.
Fortunately, the Earth's magnetic field will not disappear because of this, so although the Earth is very dry in the future, the atmosphere can still be preserved, so strictly speaking, the Earth will not become Mars in the future.
Because the Martian magnetic field experienced a sharp decline 3.9 billion years ago, since then the strength of the Martian magnetic field is only 0.1% of the Earth, without the protection of the magnetic field, the Martian atmosphere began to be continuously stripped by the solar wind, and today the thickness of the Martian atmosphere is only equivalent to 1% of the Earth, which is completely incapable of giving birth to life.
Satellite images taken by Mars rovers show that the north and south poles of Mars are currently covered with thousands of kilometers of ice sheets, which contain hundreds of billions of tons of water resources, and the results of exploration of Martian rivers and seabeds show that Mars was a planet rich in liquid water at least 3.8 billion years ago, when Mars had an ocean thousands of meters deep on the surface of the earth, and the overall climate was similar to that of today's Earth, where there was basic life.
NASA scientists believe that Mars was once hit by a superasteroid, which shook the deep geological structure of Mars, causing the core to gradually cool, weakening the strength of Mars' magnetic field, and eventually causing Mars to lose its global magnetic field, leaving only a few regional small magnetic fields, and finally making Mars the Red Planet today.
Is it possible for the Earth's magnetic field to weaken or disappear?
Over the past two centuries, scientists have observed that the strength of the Earth's magnetic field has dropped by 10%, and that the North and South magnetic poles have been reversed many times in history.
Therefore, human civilization will definitely leave the earth or even the solar system in the future, look for new habitable planets in the universe, or become a starship civilization, follow the distribution of various resources in the universe, and wander in space forever.
However, many astronomers are skeptical about whether human civilization will be able to freely explore the universe in the future, because the universe is so big, with stars separated by several light-years, galaxies and galaxies millions of light-years, and the farthest current Voyager 1 is only 17 kilometers per second.
Even if we invent a light-speed spaceship, it will take thousands of years to fly out of the Milky Way at the speed of light, this is still the result of perpendicular to the galactic plane, if it is across the galactic disk, it will take at least 100,000 years, and after flying out of the galaxy, we will face a void of millions of light-years, and the nearest Andromeda galaxy is still 2.54 million light-years away.
So what we can do now is to develop science and technology as soon as possible, and strive to achieve controlled nuclear fusion as soon as possible, only in this way can human civilization not be troubled by energy, and can leave the earth to develop resources on other planets in the solar system, such as helium-3 on the moon, hydrogen on Jupiter, and metal deposits in the asteroid belt.