Bone dry surface
rockets have reached there
people have not
gravity is less than half of what it is on earth
a year is twice as long
they run tests on samples from mars to see if there was life
NASA scientists are making a chamber where you can grow plants in space
different colors of light can affect plant growth
to comunicate you would have to send video clips back and forth. They take about 20 minutes to arrive
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1. They are developing a plan to have a return spacecraft already on mars. They are also developing technology so that you can exercise in space like you would on earth.
2. It would take 6 months if you waited for earth to go side by side with mars.
3. They need food, water, oxygen, a return spacecraft, a little air tight shelter, alarms for gasses that can kill you, and fuel.
4. When you get there you have to be able to do work. Also there might not be a way back. When you are in deep space you could get hit by a solar flare.