Who would've known human waste could be used to propel spacecraft from the moon back to Earth? Researchers responded to the call from NASA and came up with a process to convert waste to methane and propel spacecraft to Earth.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/8...
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/8...