A few weeks ago when I was out cycling with some friends, we saw a few birds who looked like they were sleeping. Someone asked me what they were doing, and I said they were resting or sleeping but I'd ...

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 ...

Editor’s note: This story was originally published in February 2018. Free time is dangerous for me. I ponder imponderable questions, like “Do birds sleep?” Well, yes, but not the same way we do, and ...

What new research on the avian brain and REM sleep in birds might reveal about our own dream lives. By Maria Popova I once dreamed a kiss that hadn’t yet happened. I dreamed the angle at which our ...