In 1969, Apollo 11 successfully landed on the moon and Neil Armstrong became the first human to walk on the moon. It was said that Mars would be the next frontier that would be conquered. However, it has been 44 years since, and it doesn’t appear that we are any closer.
How would you approximate the cost of send humans on trip to Mars, land on Mars, and fly back to Earth within the next decade? Other than the distances involved, are there any differences between a trip to the moon and a trip to Mars? What aspects of this project need would be the most costly?
If you are interested in private enterprise efforts to reach Mars, you should check out Mars One.