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The open source tool turns the vast history of the universe -- 13.8 billion years of information -- into an interactive, visual timeline. Features enable users to zoom in and out as they explore curated content about, for example, the history of life on Earth, extinction of the dinosaurs, or causes of World War I. Users also can author and share their own timelines about specific events or eras.

"Timeline Description: The Bronze Age was a period of time between the Stone Age and the Iron Age when bronze was used widely to make tools, weapons, and other implements. Bronze is made when copper is heated and mixed with tin, creating a stronger metal than copper. "