In case you hadn't heard, Las Vegas grew a bit over the past 40 years.
Now NASA has found a way to illustrate that eruption in less than a minute.
Using detailed satellite images from the agency's Landsat program, the Goddard Space Flight Center in Maryland has created a video charting the valley's sprawl from 1972 through 2010.
In the span of 40 seconds, Las Vegas expands outward like a stucco tsunami, pushing west toward Red Rock Canyon. It actually resembles a rash, thanks to the false-color images that show vegetation in red and roads and buildings in gray.
Goddard spokeswoman Aries Keck said they picked Las Vegas because they were looking for a dramatic example of growth over a relatively short span of time.
GREAT IMAGE OF HOW WE HAVE GROWN ON THIS LINK