An experiment done aboard the International Space Station demonstrates the potential for a hardy fungus to shield astronauts from cosmic radiation. C. sphaerospermum is a melanized, radiotrophic fungus capable of converting radioactive energy into chemical energy. The experiment showed that a 1.7-millimeter-thick layer of growth, or a fungal lawn as the researchers described it, blocked incoming radiation somewhere between 1.82% to 5.04% compared to the negative control.”]
Source: https://gizmodo.com/extreme-chernobyl-fungus-could-protect-astronauts-from-1844518002