At the end of a long day, we’re all looking for a soft place to rest out heads. Weary sleepers thousands of years ago didn’t have the luxury of plush pillows, though, and were instead destined to drift off to sleep on cozy slabs of stone and wood. While ancient Egyptians slept on pedestals to increase air flow and keep bugs away, early Asian cultures believed that soft pillows would steal energy from your body while you slept. They were instead replaced by minerals like jade, believed to translate energy from the stone to the brain. Good news for your energy levels, bad news for that crick in your neck.