The engineers and exacting folks at NASA certainly have definitions for that -- especially when
An infographic by the fantastic Bryan Christie Design tries to take a stab at data from that agency, the European Space Agency, Cornell University and RussianSpaceWeb.com to figure out just how successful humanity has been in reaching Mars on (unmanned) space missions.
According to data collected since 1960, failure has been historically more likely than success -- 52.4 percent of missions never made it. That's 22 failures versus 20 successes, across several nations' space efforts.
That's the bad news. The good news? The rate of success has skyrocketed since 1975 -- and is has been 68.4 percent since then. (That's 13 successes versus six failures.)
If there's anything toto Mars, it's success. Right?
Check out the entire infographic here.
This post was originally published on Smartplanet.com