The Energetic Particle Radiation Hazard en route to and at Mars, published in March 2017, 403 pages. We understand today that the potential health hazard posed to crews in deep space due to energetic particle radiation is a matter of even greater complexity than was recognized in earlier times. Scientists, Engineers and Biologists worldwide are presently investigating, in many interdisciplinary communities the problems concerned using new avenues of approach, backed up by powerful diagnostic tools, in an attempt to find a viable solution. The outcome of these multidisciplinary approaches will decide if the vulnerability of the human body will ultimately confine humanity to the cradle of Mother Earth or if, rather, mankind can indeed in future populate distant environments.