Guinea pigs are cute, furry little animals. Described as docile, easy to care for, and responsive to handling, guinea pigs have been a popular household pet since their introduction to western Europe in the 16th century (from their native South America).
Guinea pig is also the colloquial expression for the subject of an experiment. These animals were widely used for scientific research beginning in the 17th century right up into the 20th century, when they were generally replaced by “lab...

