1. In 1823, fingerprints were first recognized as a form of identification by Jan Evangelista Purkyně, a Czech. He divided them into 9 chief categories.
2. Until WWII, Czechs drove on the left side of the street, just as in Great Britain. When Hitler invaded in 1939 he changed it to the right side. A few places switched the same day (e.g. Ostrava), the rest of the area of the Protectorate on 17 March, and Prague got a few more days to implement the change and switched on 26 March.
3. In 1907, classification of human blood into four types (A, B, AB & O) was initiated by Jan Janský. He was born on April 3, 1873 in Prague.
4. In 1892, Daniel Swarovski, invented an electric machine that cut crystals more accurately than ever before, marking the beginning of a new era for crystal. His enduring passion for innovation and design has made it the world’s premier jewelry and accessory brand.
5. In 1966, the plastic explosive Semtex was invented by Stanislav Brebera, a Czech.