1. Commonly seen even today, the hourglass uses similar mechanics to that of a clepsydra. It uses two glass bulbs, one above another, with a small opening in between. The sand inside gradually falls from
top to bottom, indicating that a predetermined amount of time has passed. It is believed that it was first
created in the 8th century, although it only truly became popular around the 1300s. -задайте вапросы по тексту
сестре надо