Discoveries.
The plural form of 'discovery' is 'discoveries'.
There is one concrete noun in the sentence: scientists.The plural noun 'scientists' is a concrete noun as a word for people.The other nouns in the sentence (theory, relationships, discovery) are abstract nouns as words for concepts (ideas).
The plural of "she" is "they", so the plural of "she had" is "they had".
The plural of rose is roses. The plural possessive is roses'.
The plural of 'bunch' is bunches.The plural of 'ant' is ants.The plural of 'batch' is batches.The plural of 'day' is days.The plural of 'chimney' is chimneys.The plural of 'tomato' is tomatoes.The plural of 'umbrella' is umbrellas.The plural of 'donkey' is donkeys.The plural of 'sky' is skies.The plural of 'foot' is feet.The plural of 'show' is shows.
The plural form of 'discovery' is 'discoveries'.
Discoveries
There is one concrete noun in the sentence: scientists.The plural noun 'scientists' is a concrete noun as a word for people.The other nouns in the sentence (theory, relationships, discovery) are abstract nouns as words for concepts (ideas).
Love is a discovery, not an discovery.
The plural of "she" is "they", so the plural of "she had" is "they had".
Boron discovery is the discovery of Boron.
The plural of 'this' is 'these' and the plural of 'that' is 'those'.
Isthmi is plural. There are actually two plural forms. I will list them from singular to plural. Isthmus - Singular Isthmi - Plural Isthmuses - Plural
The plural of rose is roses. The plural possessive is roses'.
applied is does not have a plural but is apply it does have a plural.
Knights is a plural. It is the plural for knight.
The plural form of can is cans.