UkuKhanya okuMnyama kwelanga lasezinzulwini zobusuku, nguCecilia Ekbäck
Yonke into ephilayo iphantsi kwesigqi se-circadian, esekwe ngeeyure zokukhanya kunye nobumnyama bobusuku. Nangona kunjalo, izilwanyana ezihlala kwiindawo ezikufutshane nezibonda, apho isiphumo selanga ezinzulwini zobusuku senzeka khona, ziyayazi indlela yokuziqhelanisa nale ...