2 Matching Annotations
- Feb 2022
-
www.scientificamerican.com www.scientificamerican.com
-
It was not until the 14th century that scientists created the first sophisticated astronomical clocks.
The first sophisticated astronomical clocks were not created until the 14th century.
-
the first precision-geared mechanism known is a relatively simple—yet impressive for the time—geared sundial and calendar of Byzantine origin dating to about C.E. 600.
The first known precision-geared mechanism is a sundial and calendar of Byzantine origin dating to circa 600 C.E.
-