Did you know some birds can actually rest while flying? That’s right: migrant birds in particular can conserve their energy, and even restore it, by sleeping mid-flight. “Many bird species complete ...

Moving‍‌‍‍‌‍‌‍‍‌ long distances through migration is a hard task that often pushes the animals' physiological limits. However, the case of birds that can sleep while flying is probably the most ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Frigatebirds can remain airborne for days at a time without ...