Japan has a big plastic waste problem japantoday.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from japantoday.com Daily Mail and Mail on Sunday newspapers.
Inequality affected some ancient societies, but not all. Changes in farming – and the animals used in it – might have been a factor which caused it to spiral.
Like many people, historian A. Roger Ekirch thought that sleep was a biological constant that eight hours of rest a night never really varied over time and place.
How our ancestors used to sleep can help the sleep-deprived today localnews8.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from localnews8.com Daily Mail and Mail on Sunday newspapers.