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The surface gravity on Mars is only about 38% of the surface gravity on Earth, so if you weigh 100 pounds on Earth, you would weigh only 38 pounds on Mars.
Yet evacuating all 6.7 billion Earthlings would take the equivalent of a billion space shuttle launches. Even if we could launch 1000 shuttles a day, it would still take 2700 years to move the whole planet’s population.
To meet those challenges, scientists have proposed catching or moving such objects using everything from giant nets to rocket boosters or by using another satellite's gravitational pull, as Tyson's listener suggested could be done to move planets.
Moving a planet would be fundamentally similar to these approaches, but the devil would be in the details — and the size of the project makes those big details, Kessler said. "There are even bigger problems in trying to capture and move a planet.”
For example, trying to park it in a solar system in a location where it would naturally have an atmosphere like Earth would require that it was pretty much in Earth’s orbit. And to try to do that could easily result in Earth being flung out of the solar system by a competing planet's close orbit and what is known as gravitational resonance, noted Tyson.
Kessler suggested that it would be far easier to leave a suitable planet exactly where it is and change its entire atmosphere to resemble the Earth's artificially, instead, despite its conflicting position with the sun.
"Turning planets into an earth-type atmosphere, people have been thinking about that for the last 30 years," he explained.
originally posted by: korath
We also have to wear animal skins or some other type of clothing, or else we would die of exposure, the only creature on the planet that needs to do so. Everything else can go outside just fine.
originally posted by: BlackProject
It began with the design of our eyes, we cannot look at or towards the sun otherwise our very cornea would fry.
Humans, in contrast with other species, cannot sunbath for more than a given time per day without getting sunburned. This indicates that the human body was not designed for constant exposure to the sun.
The problems that mankind faces with back/spine problems are a clear indication that our bodies are not built so perfectly as the natural world would lead us to believe. It could bode questions that our original environment (for humans) may not have been surrounded by such heavy gravity. Earth’s heavier gravity puts strain on the skeleton and the result could be the reason our bodies suffer from such pains, we are used to an atmosphere that is lighter then this one.
Illness strikes us all, some scientists have debated that our bodies get weak because our bodies are set to a 25 hour per day environment instead of 24 as on Earth, and we have not adapted yet.
The older theories add to this concept than in many cases, when there is an illness, humans are disabled and cannot carry out their workload, which rarely occurs in the other species.
It takes around 5 to 10 years (depending on the child and environment) before it can perform the duties and the requirements of carrying their weight around. Something that is never seen in all other species put together.
The human being does something that no other species has been observed doing – humans use external ways to overcome his physical shortcomings. Handicapped at birth and use anything and everything to keep our degrading health up to scratch.
There is no observance in any other species than the human being for retaliatory attacks, pre-emptive strikes, and most of all weapon construction in ever increasing lethal potential.
Unless anyone has ever seen a mouse with an M-16 at hand and never bothered to inform anyone about it.
Mankind is brought here as an experiment of evolution.
Mankind landed on Earth on starships that escaped a destroyed world.
Considering Mars has a 25h day circle, less gravity and less sun.
Maybe we came from there?
Mice do not have the same mental capacity or level of intelligence as humans do (no species does), so this is entirely irrelevant.