New Scientist quickly covers three theories of space and time in an informational video.
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The data goes back to 1960 and up to the most current estimates for 2009. Each line represents a country.
Jobs and pay can vary a lot depending on where you live, based on 2013 data from the Bureau of Labor Statistics. Here’s an interactive to look.
Watch the regional changes across the country from 1990 to 2016.
There are many exercise apps that allow you to keep track of your running, riding, and other activities. Record speed, …