DURING spring and summer of this year, I made some experiments with the intention of throwing light on the physiological mechanism of diurnal activity rhythms. An account of some of the main ...

Axolotl embryos measure approximately 2–3 ... Many amphibians begin their lives by hatching from eggs as aquatic larvae and then undergo metamorphosis, a restructuring of the anatomy and ...

Axolotls are peculiar pets known for their frilly gills and cute little smiles. However, these aquatic amphibians are more than just an appealing appearance. Their history, behaviors, and ...