 Malcolm von Schantz, wigisha isomo rijyanye no kujya ibihe kwibice bitandukanye mu mikorere yumubiri chronobiology kuri Kaminuza ya Surrey mu Bwongereza, yongeyeho ati: Nubwo ntekereza ko buri wese ubishoboye akwiye guharanira kugira ingengabihe ihoraho, sintekereza ko dukwiye kubwira abantu badashoboye ibyo ko batagomba kuryamira mu mpera yicyumweru. 