Could these strange sunken structures be the origin of Perth colonization? To see the scientific bathymetry with your own eyes, click the link below: https://emodnet.ec.europa.eu/geoviewer/?layers=12524:1:1,12522:1:1,8353:1:1,12769:1:1,12768:1:1,10367:1:1,12523:1:1,10133:1:1&basemap=ebwbl&active=undefined&bounds=115.06275415986872,-31.9672064706399,115.29728907470309,-31.81091093755105&filters= There is even a second…