Great Animation Showing Two Centuries of U.S. Immigration

Two Centuries of U.S. Immigration (1 dot = 10,000 people)

http://metrocosm.com/us-immigration-history-map.html

(Click on above link.)

Here’s Everyone Who’s Immigrated to the U.S. Since 1820

"From 1820 to 2013, 79 million people obtained lawful permanent resident status in the United States. The interactive map below visualizes all of them based on their prior country of residence. The brightness of a country corresponds to its total migration to the U.S. at the given time.

Use the controls at the bottom to stop / resume the animation or to move back and forth in time."

Thanks to Robert Forrant, facebook friend from Lowell, MA who posted this yesterday. Sharing was encouraged, and I thought some genealogy friends would enjoy seeing this.