The complexity of landing astronauts on Mars and returning them is monumental. Here's why and how our return to the moon may help us ultimately reach the red planet.
Challenge 1 - You can't just point and shoot.
Challenge 2 - We'll have to stay a while.
Challenge 3- Huge Rockets will be needed to send big payloads.
Challenge 4 - Resupply isn't an easy option.
Challenge 5 - We'll need a more versatile space station.
Challenge 6 - There will be expected and unforeseen problems.