The word "immoral" is normally used to describe persons or actions. In a broader sense it can be applied to groups or corporate bodies, beliefs, religions, and works of art. To say that some act is immoral is to say that violates some moral laws, norms or standards.
... explorer
Bjarni Herjulfsson[?] - Viking discoverer of North America
Thor Heyerdahl, (1914-2002), Norwegian explorer
Henry Hudson, (died 1570), discovered the ...