Nasa are sending humans to mars because it has a background of evolution very similar to earth, meaning we can discover more about the past and future of our planet. Mars had the capability to have life in the past, and if we can work this out we can answer the fundamental question: Does life exist anywhere else?
Now, about humans leaving earth. Humanity will have to leave earth at some point - due to issues like overpopulation, resource shortages and NASA as well as many other scientists are planning things like human missions to asteroids, and eventually developing technology for a human mission into deep space. Astronauts on the ISS are helping us understand how the body changes in space (for example, fluids inside your body aren't pulled down by gravity). Furthermore, these astronauts are helping us prove the technologies needed for exploration into deep space. I found a site about stephen hawking talking about how we need to leave earth http://www.space.com/8924-stephen-hawking-humanity-won-survive-leaving-earth.html. http://www.theregister.co.uk/2015/02/20/hawking_alert_leave_planet_earth_stupid_humans/
However, another thing about the matter of exploration further into space, and why we haven't encountered aliens is that some scientists believe that there a many, many, many sentient civilisations out there, but they wipe themselves out so quickly they never cross paths.
Furthermore, there are so many things we need to think about if we will travel and colonise other planets. Like how the planet's gravity will most likely be different, the atmosphere will be at a different density. This is why we need to expand our presence in the solar system, and one day send a long term manned mission to mars.
No comments:
Post a Comment