Topic: sleep timing

Some 320 million years ago, amniotes began to invade our planet's terrestrial niches. These amniote ancestors gave rise to two lineages that have led to today's mammals (synapsids) and sauropsids (reptiles and birds). Mammals and non-avian reptiles are the only vertebrates with a layered cerebral cortex. To which degree their circadian systems share common mechanisms or have unique adaptions in regulating sleep timing and architecture is unknown. Early circadian studies in reptiles lack conclusive interpretations and technologies have since greatly improved. The bearded dragon is an establishe