1056 Supernova Crab nebula last seen by the naked eye
1500 – Portuguese navigator Pedro Alvares Cabral discovered Brazil.
1823 R J Tyers patents roller skates
1838 English steamship “Sirius” docks in NYC after crossing the Atlantic, first transatlantic steam passenger service
1969 1st human eye transplant performed
1970 1st Earth Day held internationally to conserve natural resources
By: Archa Dave