Skip Navigation
FREE: Federal Resources for Educational Excellence - Teaching and Learning Resources From Federal Agencies

Subject Map
Applied Sciences
Computers/Tech (16)
Engineering (26)
Earth Sciences
Climate Change (42)
Environment (64)
Geology (37)
Oceans (42)
Other Earth Sciences (76)
Life Sciences
Animals/Zoology (35)
Botany (19)
Cells (26)
Diseases (35)
Genes, Evolution (43)
Human Body (31)
Interdependence (25)
Medicine (28)
Other Life Sciences (45)
Physical Sciences
Chemistry (37)
Energy (25)
Physics (46)
Other Physical Sciences (23)
Space Sciences
Aeronautics (27)
Astronomy (60)
Other Space Sciences (31)
Other Science (45)
What's New

Science » Other Science

A Walk Through Time

looks at the evolution of timekeeping—how humans have measured the passage of time throughout history. The site describes and shows depictions of ancient calendars, sun and water clocks, mechanical and quartz clocks, and world time scales and time zones. (National Institute of Standards and Technology)

   Go to this website

Interesting Fact:

April 1 has long been an opportunity for children to tease their teachers.
Artist's drawing of Stonehenge

Ancient calendars

 This website also appears in:
Science »  Other Science » 
World Studies »  Other World Studies » 

    About FREE      Privacy     Security     Disclaimer