From impossible expectations to emotional labor, oldest siblings were the test run—and they’re still healing from it.

Researchers reveal that the guinea pig pre-implantation embryo is very similar to the human embryo, spurring a better understanding of infertility and early human development.

This week, we’re finding out what guinea pigs are trying to tell us through their delightful and sometimes overbearing squeaks and wheeks. This is also known as bubbling, and it is often heard ...