Question: What are some good links to learn the truth about: Secret Nasa agendas. The truth about exploring mars. ?
Sounds like you might be listening to the supremely ignorant Richard C. Hoagland, who has written books on the so called face on mars and Nasa conspiracies, both of which are total lies. Use some common sense: What incentive is there for NASA to conceal "facts" about past or present life on Mars? Such a discovery would fuel tremendous interest and more importantly increased funding, probably a crash program to send a crew to Mars.
Some of the other answers have already given you links to sites with NASA data. As far as Secret NASA agendas and "truth" about Mars, there are no credible evidence for any of this crap!
NASA is one of the most transparent organizations on Earth. THERE ARE NO CONSPIRACIES!!!!!!!!!!!!!!!!!!!!!!!!!!!!…
The truth about Mars:
If you can see by exploring the site, NASA doesn't keep any secrets. They are really public friendly.