Support WBURThe Interdependence Of Humanity And EarthMarcelo GleiserNovember 08, 2017 ShareStromatolites (deposits built by colonies of cyanobacteria), are seen underwater at high tide in Shark Bay, Western Australia. (UIG via Getty Images)
Stromatolites (deposits built by colonies of cyanobacteria), are seen underwater at high tide in Shark Bay, Western Australia. (UIG via Getty Images)