Next stop, Mars? Well, not quite, but a new estimate puts the price tag for a potential manned mission to Mars at a much easier-to-stomach $80 billion to $100 billion.
Click here to read Bob's blog.
No email address was supplied by
To complete your registration on this site, please supply an address.
Please confirm or modify the email address to which you will have subscription offers sent.
For a more personalized experience, please supply the following optional information.