Studies of bone abnormalities in skeletons from ancient Syria have led paleontologists to conclude that operating similar querns caused young women repetitive stress injuries ​ — notched kneecaps, damage to the last dorsal vertebra, and severe osteoarthritis in the big toe.
चवथ्या किंवा पाचव्या शतकादरम्यान, ग्रीसमध्ये प्राथमिक स्वरूपाची चक्की निर्माण करण्यात आली.