Do Animals Sleep in One Long Stretch? | Kkomkkom Insects & Animals

A dolphin has to come up to the surface to breathe. So how does a dolphin sleep? ① Always lying on the sea floor ② One half of its brain at a time ③ It never sleeps. Kkomkkom picks ③ without blinking, because there are no pillows in the sea, and then scientists take a look at a dolphin's brain. This video asks whether animals sleep in one long stretch, the way we do. It starts by splitting a dolphin's brain signals into left and right, then follows the great frigatebird, which can fly over the ocean for up to ten days without stopping, to see how it sleeps in the air, and chinstrap penguins guarding their eggs, which get by on sleeps just seconds long. At the end, it tries the idea on an example drawing of a newborn baby's day of sleep: with all that waking, did the baby sleep only a little? Words you'll meet: great frigatebird · chinstrap penguin One sentence worth keeping: Sleep isn't always one long stretch: some animals sleep with half their brain at a time, or in short bursts. Kkomkkom Insects & Animals answers one question about insects and animals at a time. Every video stands on its own. More questions on the same topic:    • Kkomkkom Insects & Animals   The visuals in this video were made with AI. The script is original, edited by a person, the narrator is the same in every video, and every fact is checked before release. The brain-signal lines and sleep time bars are explanatory drawings, not measured recordings, and the chart of a newborn's day of sleep is an example. Sources · Lyamin, O. I. et al. (2008), "Cetacean sleep: An unusual form of mammalian sleep," Neuroscience & Biobehavioral Reviews 32(8) https://www.semel.ucla.edu/wp-content... · Rattenborg, N. C. et al. (2016), "Evidence that birds sleep in mid-flight," Nature Communications 7: 12468 https://www.nature.com/articles/ncomm... · Max Planck Society, "First evidence of sleep in flight" https://www.mpg.de/10673637/frigatebi... · Libourel, P.-A. et al. (2023), "Nesting chinstrap penguins accrue large quantities of sleep through seconds-long microsleeps," Science 382(6674) https://doi.org/10.1126/science.adh0771 · Max Planck Institute for Biological Intelligence (2023), "Penguins nesting in a dangerous environment obtain large quantities of sleep via seconds-long microsleeps" https://www.bi.mpg.de/news/2023-11-ra... · American Academy of Pediatrics, "Getting Your Baby to Sleep," HealthyChildren.org https://www.healthychildren.org/Engli... · Hirshkowitz, M. et al. (2015), "National Sleep Foundation's sleep time duration recommendations: methodology and results summary," Sleep Health 1(1) https://doi.org/10.1016/j.sleh.2014.1...