Nodding off is dangerous. Some animals have evolved extreme ways to sleep in precarious environments

When animals nod off, they're most vulnerable to sneaky predators. But despite the risks, the need for sleep is so strong ...
Rutland Herald

The Outside Story: Eye-opening realm of avian sleep

Birds exist in a fluid and unpredictable world. Survival depends on remaining constantly alert, adapting and responding to encounters with predators and environmental conditions that change with the ...