A kaleidoscope of currency reveals what humans have valued over time. Hi-resolution scans of banknotes from 23 countries ranging from the 1800s to the modern-day. Machine learning programs were used to zoom in on the intricacies of the engravings.
2012
1930
2007
2020
2013
2000
1950
1944
2009
1999
2005
1971
1978
2010
2001
2004