Swedish Maritime Administration side-scan sonar in the Baltic Sea locates a wreck, identified in 2019 as belonging to a date around 1500. Events January: A new analysis of old excavation reports, combined with newly done fieldwork, leads researches to conclude that the Sassanid Persian besiegers used poison gas against the Roman defenders during the Fall of Dura Europos. The gas, made by adding sulfur crystals and bitumen to prepared fires, was used in tunnels undermining the walls. Almost two dozen Roman soldiers were killed. February: Egypt renews its request for the return of the famous bust of Nefertiti from the Egyptian Museum of Berlin in Germany, after an article by Der Spiegel reports that German archaeologists deceived Egyptians about the worth of the piece after its initial discovery. February: Bulgarian archaeologists report that looters have plundered a partially excavated Roman site near Rousse. February: Experimental archaeology on replicas of the cannons found on a sunken Elizabethan warship indicate that the British employed revolutionary naval tactics at the time, explaining the rise of British marine power during the 16th century. February: An auction at Christie's in Paris, France, makes a record-breaking 370 million euros (US$490 million). The auction sells of the private collection of Yves Saint Laurent and Pierre Bergé, which includes Greek and Roman sculptures. The selling of two Chinese bronze pieces is controversial. They were looted in the 19th century, prompting China to demand restitution. 20 June: The Acropolis Museum in Athens is officially opened. July: The University of Manchester Archaeology Unit is closed Publications January: A publication in the Proceedings of the National Academy of Sciences finds no evidence of a single event causing many simultaneous fires throughout North America nearly 13,000 years ago, contradicting the theory that a comet explosion may have caused the Quaternary extinction event. February: The Max Planck Institute for Evolutionary Anthropology in Germany publishes the first draft of the Neanderthal genome, covering 63% of the 3.2 billion base pairs. February: A publication in Science discusses the results from a study into over a dozen early hominid footprints, discovered over the last couple of years in Kenya. The prints date back 1.5 million years and were most likely produced by several individuals of the species Homo erectus. The results confirm that hominids evolved a modern walking gait even before Homo sapiens existed. March: British archaeologists publishing in Science lay out new evidence confirming that