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.

《环球邮报》 (The Globe and Mail)报道，加拿大正在准备应对美国最早可能在2月1日征收的关税，同时仍尽最大努力阻止其成真，已向特朗普政府发送视频证据，展示本国为阻止移民和毒品问题所采取的新措施。