Discoverer (noun)

1. A person who discovers something new, such as a place, a fact, or a scientific principle.
2. A person who makes an important discovery in a particular field of study or research.

Origin:

From discover, meaning "to find or come upon something for the first time".

Examples:

1. Christopher Columbus is considered as the discoverer of America.
2. Marie Curie was a pioneering discoverer in the field of radioactivity.
3. The discoverer of the vaccine was awarded the Nobel Prize.
4. The discoverer of the new planet was celebrated by the scientific community.
5. The discoverer of the ancient ruin was hailed as an archaeologist.