The oldest known animal ‘footprints’ on Earth, left by bilaterian animals with paired appendages about 545 million years ago, have been discovered in the Yangtze Gorges area of South China. Trackways and burrows excavated in situ from the Shibantan Member, Dengying Formation, China: (A and B) epirelief (top bedding surface) and hyporelief (bottom bedding surface), respectively; trackways (TW1 and TW2) and undermat burrows (UB1 to UB3) are labeled;...
