HZE ions
... that highly charged HZE ions make up just 1% of galactic cosmic rays, but they cause as much biological damage to astronauts as protons, which make up 85%?
... that highly charged <b id="mwCm4"><a class="mw-redirect" href="./HZE_ions" id="mwCm8" rel="mw:WikiLink" title="HZE ions">HZE ions</a></b> make up just 1% of <a class="mw-redirect" href="./Galactic_cosmic_ray" id="mwCnA" rel="mw:WikiLink" title="Galactic cosmic ray">galactic cosmic rays</a>, but they cause as much biological damage to astronauts as <a href="./Proton" id="mwCnE" rel="mw:WikiLink" title="Proton">protons</a>, which make up 85%?