One of the interesting arguments for colonization of Mars is that it could be a good place for old people with serious joint problems. There are likely quite a

One of the interesting arguments for colonization of Mars is that it could be a good place for old people with serious joint problems. There are likely quite a few people who would be in wheelchairs on Earth but could walk around just fine on Mars. It sounds terrible to suggest sending your elderly relatives to an old folks home on Mars, though.