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.

龙行龘龘辞旧岁，巳巳如意迎新春。 值此团圆喜庆的美好时刻，我谨代表徐工集团、徐工机械党委、董事会和经营班子，给大家拜年了！向关心支持徐工发展的各级领导、各界朋友致以新春的祝福，向奋战在各条战线的全体员工和家属致以最诚挚的问候！

Scientists researching Alpine glaciers store ice in Antarctica. By analysing air bubbles in the ice they may be able to predict the future ...