Science Knowledge Quiz
Who developed the polio vaccine? Does water boil at different temperatures based on altitude? Which is the hottest of Earth’s three layers? Take our science quiz and see how you compare with Americans overall.
How do Americans use Twitter for news?
A look at how researchers analyzed news habits on Twitter using a small but representative sample of users drawn from a national survey of U.S. adults.
Gun Rights vs. Gun Control
The Pew Research Center has tracked shifting public opinion on gun rights and gun control over the past 20 years. Explore our polling data to discover how demographics influence public opinion on guns.
International Opinion About Greatest Global Threats
Across the nations surveyed, the level of concern about different international issues varies considerably by region and country, and in some places multiple issues vie for the top spot.
How Many Live on How Much?
Share of global population that lives on a given level of income or consumption.
Global Income Calculator
Are you in the global middle class? Find out with our income calculator.
World Population by Income
How Many Live on How Much, and Where
Major Gaps Between the Public, Scientists on Key Issues
Despite broadly similar views about the overall place of science in America, there are striking differences between the public and scientists’ views on a host of science-related issues, from whether genetically modified foods are safe to eat to whether the world’s growing population will be a major problem.
Global Indicators Database
Updated in June with polling data from 2015 spring survey
How Census Race Categories Have Changed Over Time
The race, ethnicity and origin categories used in the U.S. decennial census have shifted over time, often in a reflection of current politics, science and public attitudes. Our interactive tracks the category names from 1790 to 2010.