The earth has the technology today to in the future defend itself from meterors and asteroids. It takes a lot more than rockets to destroy meteors and asteroids.
... compresses the air in front and around it so that the air glows and at night you see a "shooting star" - a meteor. If it impacts the ground before evaporating, it is a bolide and may leave a mineral remnant called a meteorite.
Something like 10,000 meteors, or more, head straight for the earth every day, and aren't visible at all until they smash into the atmosphere and begin to burn up.
The Moon's surface is heavily cratered because of of meteor impacts. Meteors are able to more commonly strike the Moon's surface than the Earth's surface because the Moon's atmosphere is not as strong as the Earth's, so less meteors burn up in the Moon's atmosphere than they do in the Earth's atmospheres. So the craters are simply the result of heavy meteor impacts. Answer #2 The moon has no weather to erode craters. Speculation is that the earth has been hit at least as many times as the moon because of our greater mass. Wind, water, and plate tectonics wipe out the evidence on earth.
Do they? I don't believe this is known. I have not been able to find any real estimate for the numbers of meteorites hitting the Moon or the Earth so a comparison is kind of unwarranted.However, I would expect more meteorites to hit the Moon than the Earth *per unit surface area* because the Moon has very little atmosphere. A lot of meteors hit the Earth's atmosphere without ever reaching the Earth's surface because they burn up in the air. The Moon has no such protective covering and so will be hit by all the meteors that head its way.
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It hurts and if you kick them right you will be able to defend your self and get away.
It is possible, however, in the distant future. Our current technology does not allow us to even reach deeper than the Earth's crust, which is only a mere fraction of the Earth's radius. Technology must be very advanced, requiring drills that are able to drill about 6,000 metres deep, vehicles and suits that are able to withstand temperatures of 5,500 degrees celsius, which is clearly impossible for Man to come up with in the near future. However, there are many possibilities that we are able to get to the core.
There are several thousand "shooting stars" visible every night. During "meteor showers", they are even more common than usual. To see meteors, you will want to go to someplace where the skies are fairly dark; if you live in an urban area with street lights, you will be able to see only the brightest meteors. Meteors are more often visible between midnight and dawn, since the dawn terminator is the "leading edge" of the Earth as it orbits the Sun.
Defend(A+ answer)
They have to be able to defend their dominance.
Earth is not completely safe from a major meteor strike, though there are a number of factors that help us to avoid a catastrophic hit. The solar system is a little older now so there is less debris floating around when compared with the beginning of the solar system. Other planets, specifically Jupiter, take a lot of the hits for us, while technology has advanced enough now for us to spot large meteors early on and to possibly do something about it. Its unlikely though that such countermeasures would be able to deal with anything very large. Earth still gets hit by meteors quite regularly, but the meteors involved are quite small and often fall in remote areas.
In the near future, if we create chloroplasts for human photosynthesis, then we don't have to eat food anymore. In this case, the earth maybe able to support 100 billion people.