Feature

In 2017, among the 25 most populous countries, Egypt, India, Russia, Pakistan and Indonesia had the most restrictions on religion, while Japan, South Korea, South Africa, the Philippines and Brazil had the fewest restrictions. Click play to see how restrictions have changed in each country since 2007. Read the full report.

In 2017, an estimated 10.5 million unauthorized immigrants lived in the United States, down from a peak of 12.2 million in 2007. Explore trends in the unauthorized immigrant population for U.S. states, as well as for birth countries and regions, based on Pew Research Center estimates.

Worldwide, an estimated $625 billion (USD) was sent by migrants to individuals in their home countries in 2017, a 7% increase from 2016, when the amount was $586 billion, according to economists at the World Bank. This increase follows two consecutive years of decline.

Test your knowledge of science facts and applications of scientific principles by taking our 11-question quiz, then compare your answers to the average American and across demographic groups.

Sortable table of estimates of unauthorized immigrant populations in 182 U.S. metropolitan areas, derived from a sample of census data.

Facebook and WhatsApp are the most widely used social media platforms and messaging applications in 11 countries around the world.

More countries see climate change as a top international threat, but many people also name ISIS and cyberattacks as their top security concern.