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Scientists uncover how genetic factors influence reproductive timing, aging, and health, shedding light on fertility trends and their impact on future generations. Study: Genetics of female and male ...

An international research team has used high tech methods to uncover a mechanism through which the right combination of bacteria in the gut can lead to microbiome resilience to dietary alterations, ...

Pt. I. Evolutionary history -- Tetrapod relationships and evolutionary systematics -- Anatomy of amphibians and reptiles -- Evolution of ancient and modern amphibians and reptiles -- pt. II.

Scientists have documented same-sex behavior in many animals. Learn what it means, how it varies, and why human labels can mislead.

The 2011 Guide for the Care and Use of Laboratory Animals contains recommendations regarding the amount of cage space for mothers with litters. Literature on cage-space use in breeding rats is sparse.