I'm pretty much a Saganite on this issue. The time and treasure required to colonize Mars is very probably not worth it. We can learn whatever we like with unmanned vehicles.
We landed on the moon very nearly fifty years ago. If the colonization of space was practical, Luna City would be a going concern by now.
Boru
We landed on the moon very nearly fifty years ago. If the colonization of space was practical, Luna City would be a going concern by now.
Boru
‘I can’t be having with this.’ - Esmeralda Weatherwax