What is the plural of "mouse"?

Do you know how we can turn a singular noun into a plural noun? The solution is simple. Just add an '-s' at the end of the word, and whoosh, the job is done. The word 'house' becomes 'houses', 'word' ...
The Guardian

Why do some English words have the same singular and plural? Examples are mostly animals - deer, fish, moose, sheep, swine, buffalo - but also aircraft, stone (weight), head ...

Could it be that these are animals that were hunted, fished, or herded and that there was a convention that used the singular as a sort of generic plural when going after these creatures for sport or ...
Hartford Courant

PLURALS OF SINGULAR USES

Q. We all know that the plural of the word “mouse” is “mice.” However, if I write the word “mouse” 10 times on a piece of paper, would you then refer to them collectively as “mice” or “mouses”? Also, ...
The New York Times

Plurals of Foreign Words.

TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of online ...
The New York Times

ARE OR IS?; Whether a Plural or a Singular Verb Goes With the Words United States.

Written for THE NEW YORK TIMES SATUR- DAY REVIEW By the Hon. John W. Foster. Formerly Secretary of State, United States Minister To Russia, Spain, &C. TimesMachine is an exclusive benefit for home ...