A new Pew Research Center survey finds high levels of concern about religious extremism among Muslims living in the North Caucasus area of Russia and the neighboring Central Asian countries of Kyrgyzstan and Kazakhstan. It also finds that most Muslims in the region reject violence against civilians.

Across the U.S., religious courts operate on a routine, everyday basis. How do some of the country's major Christian traditions and other religions - including Islam, Judaism, Buddhism and Hinduism - decide internal matters and apply their religious laws?

A breakdown of 17 major religious groups' views on the issue of abortion.  

A country-by-country analysis of data from more than 2,500 censuses, surveys and population registers finds that 84% of adults and children around the globe are religiously affiliated. The study also finds that the median age of two major groups – Muslims (23 years) and Hindus (26) – is younger than the world’s overall population (28), while Jews have the highest median age (36).

In recent years, same-sex marriage has been a contentious subject within many religious groups in the U.S. Here is an overview of where 16 religious groups stand on this issue.