I've never understood why it's so important for humans to go to mars. We live on a planet where many people still endure tremendous suffering due to starvation, disease and war. In the next 50 years we will very likely have to begin large scale geo-engineering in order to mitigate climate change and ocean acidification. Prestige "science" like sending people to the moon and mars is a luxury.
I can't believe how insensitive you are. Do you know how many kids that computer you're using could feed? Sell that computer and buy orphan food. Right now. Otherwise you're Hitler.
Where do you stop? I spent 5 bucks on lunch today. Should I have not eaten because people are hungry? What about the computer and internet you typed this on? Should we have not invested in those and spent all the money on curing disease?