An image of "Sundial", created by Stefano Buonsignori in 1587 (Wood, height 17 cm).

Why do we need calendars and clocks? To survive in this complex society, you need to track what others are doing and when they're doing it. You also need to know what's happening in the natural world. This article discusses how/why...

Ancient Chacoans used shadows to tell daily time and seasons. Build a model that demonstrates the changes in Earth's tilt that affect the length of shadows relative to the sun that determines the seasons. The lesson plan uses everyday...

Design fun and exciting experiments using paper plates. This resource teaches you how to make great experiments and models using common paper plate products.

Medieval and Renaissance-era scientific instruments are catalogued and displayed. Find references to the makers of the instruments and the ways the tools were once used.

An interesting site with links to articles about all kinds of Slovenian cultural topics. Click on "Sloveniana" and choose articles from Lipizzaner horses to the unique Slovenian hayracks to the lace of Idrija. New articles are submitted...

Plenty of cool activities about the Earth's rotation can be found here, such as tracing shadows, observing shadows during different times of the day, and tracking the sun's path in the sky to understand the rotation of the earth.

Discover more about the sun when you visit this educational resource. The content of this site includes solar fun facts, experiments, and activities.

This site from The Franklin Institute presents a number of activities, games, exhibits, scavenger hunts, resources, links related to clocks and telling time.

Excellent resource for "paper-plate" activities that help simplify various astronomy topics. Learn how to build a "Moon Finder" and "Planet Pointer," and create a paper-plate model that explains the Transit of Venus.

Very simple directions for making a sundial and a question and answer section that explains why and how a sun clock works.

Very simple directions for making a sundial and a question and answer section that explains why and how a sun clock works.

Mount Songshang is considered to be the central sacred mountain of China. At the foot of this 1500 metre high mountain, close to the city of Dengfeng in Henan province and spread over a 40 square-kilometre circle, stand eight clusters of...

Learn how to use the sun to tell time. This simple activity reinforces the concepts of light and shadow, night and day, time, and geographical north vs. magnetic north.

This site from Suzy's World and Suzy Cato provides a brief definition of what time is and early methods of measuring time. Also includes two time experiments and tells you how to figure out your age in hours.

This Montana State University site provides a simple chart on the spring and fall equinox and a description of the process.

This Montana State University site provides a simple chart on the spring and fall equinox and a description of the process.