Air Conditioners in America: Percentage of U.S. Households with at Least One AC
Air conditioning transformed American homes in the 20th century. Here’s how it began, where it’s most common today, and which states hardly use it at all.
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United States
Maps of the US
How Electoral Votes Have Shifted Over Time — And How They’d Look If Based Only on Population
From the current 2024–2028 electoral map to a “what-if” version based purely on population, these maps offer a fresh look at how political power is distributed across the United States.
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China, the U.S., or the EU: Who Dominates World Trade in 2024?
A side-by-side world maps show how global trade has changed since 2000. China has rapidly expanded its influence, becoming the top trading partner for much of the world – overtaking both the U.S. and the EU in many regions.
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From Coal Trains to Bullet Trains: How China Outbuilt the U.S. in High-Speed Rail
China started building railways in the 19th century – just like the Untied States – but when it comes to high-speed rail, it’s left the U.S. in the dust.
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Where Interracial Marriage Was Still Illegal in 1966—Just One Year Before It Was Struck Down
It’s hard to believe, but until 1967, marrying someone of a different race was still illegal in parts of the U.S. This map shows where those bans were still in place just one year before the Supreme Court struck them down for good.
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What America’s Bridges Are Really Made Of—By County
Steel or concrete? A closer look at 743,398 bridges across the U.S. reveals which material wins out – by county. This colorful map based on the latest 2025 National Bridge Inventory shows how bridge-building choices differ from place to place.
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How Hurricane Forecasts Got Way Better
Forecasting hurricanes used to feel like watching a storm through frosted glass. Today, we have a much sharper view. This post explores how the “cone of uncertainty” has narrowed – and what that means for safety, science, and storm prep.
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Why U.S. Time Zones Aren’t as Straightforward as They Look
Ever wondered why Arizona seems to ignore daylight saving time? Or why some towns in Indiana run an hour ahead of their neighbors? This map explains how U.S. time zones work, and why they don’t always make sense.
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US states where you can’t pump your own gas
This map shows the two remaining U.S. states where you can’t always pump your own gas, and explains why full-service stations still survive in a mostly self-serve country
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Worst States and Cities for Allergies in the U.S. Mapped
Over 100 million Americans suffer from allergies — but where you live can make a big difference. This post explores indoor and outdoor allergy severity across U.S. cities and states using a detailed study by HouseFresh. See how climate, pet ownership, and urban development shape allergy risk, and discover which places are hardest — or easiest — to breathe in.
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