from english.elpais.com6 months agoResearchers have described these exchange cycles as windows to the outside.english.elpais.comhttps://english.elpais.com/health/2023-11-20/a-window-to-the-outside-allows-people-to-interact-while-they-sleep.htmlenglish.elpais.comhttps://english.elpais.com/health/2023-11-20/a-window-to-the-outside-allows-people-to-interact-while-they-sleep.htmlenglish.elpais.comhttps://english.elpais.com/health/2023-11-20/a-window-to-the-outside-allows-people-to-interact-while-they-sleep.html Read at english.elpais.com #sleep #research #brain activity[add][|| ... ]