History textbooks commonly use a timeline for this—a chronological chart that shows when various events happened.

There appears to be a glitch currently impacting some Google Maps users, causing their historical Timeline data to vanish.

Follow this timeline to chart the key historical figures and events. Learn how the series has been completely restored to Ultra HD – 4K resolution.

Follow this timeline to chart the evolution of the park system, and the history of the parks. The information in this timeline was gathered in 2009. Explore historical images of the national parks ...