Between 1892 and 1954, millions of immigrants arrived at Ellis Island in New York in search of the American dream. In the early 1900s, amateur photographer Augustus Sherman worked as a clerk at the immigration station. He snapped hundreds of the new arrivals dressed in the traditional garments of their countries of origin. Experts are now working to colourise some of his photographs, which are housed in the New York Public Library, using a process that marries historical research with cutting edge science. Head over to Buzzfeed to see the remarkable results of their work.