Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient world slept only 6.5 hours a night.
[1] Nipanikar S U, Mundhe N B, Gajare K V, et al. Evaluation of efficacy and safety of Amarantha footcare cream in subjects suffering from ... Potnis V. A Review on Heel Fissures and its Management.