On more than one occasion, I've gotten under the covers utterly exhausted from a day spent working, ready – begging, really – for a good night's rest. The best way I could explain it for anyone who has never been to wartime Ukraine is to imagine the sudden, lacerating feeling when the first sharp note of your iPhone's morning alarm sounds – multiplied by 10 and often in the dead of night. There has been a surge in Ukrainians suffering from sleep-related problems due to the war, according to Dr. Yevhen Poyarkov, the head of the Ukrainian medical network Dobrobut's sleep center.