The pin mold fungus Phycomyces blakesleeanus forms a dense forest of vertically growing fruiting bodies, but how does it know which way is “up”? New research publishing 24 April in the open access journal PLOS Biology, from Gregory Jedd’s group at the Temasek Life Sciences Laboratory, National University of Singapore, reveals that the fungi have acquired and re-modelled a gene from bacteria to help them make large gravity-sensing crystals.