America’s tire mountains: 90 percent are gone, thanks to recycling programs
Once we had 2 billion tires scattered around the U.S. landscape, but now 90 percent of the piles are gone. Ground rubber from tires is becoming roadways, playground equipment and auto floor mats.
Infographic: Home gardening in the U.S.
As more and more Americans grow their own fruits and vegetables, MNN digs up some dirt on this DIY food revolution.
What was the purpose of these giant, concrete arrows?
Dotting the American landscape — from San Francisco to New York — are a series of 70-foot concrete arrows.
If you’re tired of traffic and high gas prices, it’s time to put the car in park, unbuckle your seatbelt and enjoy one of these vacation destinations where your wheels aren’t welcome. You won’t find a single automobile in any of the places on our list — just bicycles and the occasional golf cart or horse-drawn carriage.
10 places in the U.S. where bikes and boats rule
Could you pass the U.S. citizenship test?
Among the requirements for naturalization — when a person not born in the United States voluntarily becomes a U.S. citizen — is the famous civics test. Test your patriotic proficiency with these questions from the U.S. Citizenship and Immigrations Services.