Mysteries about the Moon, etc.

Why NASA has never returned to the moon.
http://www.youtube.com/watch?v=BbhLad96JwA&list=PLB8E21D82F8CB70C2

What happened on the moon?
http://www.youtube.com/watch?v=yo5w0pm24ic,
http://ca.news.yahoo.com/blogs/geekquinox/celebrate-moon-landing-10-debunked-moon-hoax-arguments-211040304.html

http://ca.news.yahoo.com/wow-nasa-probes-see-earth-moon-saturn-mercury-221321345.html

Is there life on mars?
http://www.youtube.com/watch?v=JPJRpBWuGbY

The Mars earth connection
http://www.youtube.com/watch?v=iD_NxduWL3o

A-51
http://www.youtube.com/watch?v=9oco_LAfHjQ

Underwater ET bases
http://www.youtube.com/watch?v=iu_XKfyEnNE

The ancient astronaut cover up
http://www.youtube.com/watch?v=rSfoeOpjzWo,
http://www.youtube.com/watch?v=CGCswr6qwC0