In the southern yellow-billed hornbill, Tockus leucomelas, we found first-hatched nestlings had a higher growth rate and that growth rate was negatively correlated with mortality, such that early hat...

Dopamine encoding of reward prediction errors naturally fluctuates over females’ reproductive cycles with estrogenic signaling due to reduced expression of dopamine reuptake proteins.

Researchers say it would hurt facilities that work on medical issues such as cancer research and heart disease. Elon Musk contends the old policy was ‘a ripoff.’

Gerbils exhibit stable, family-specific vocal dialects over weeks, suggesting vocal communication may play a key role in representing kinship in natural social groups.