The evidence is solid but not definitive, as the conclusions rely on the absence of changes in spatial breadth and would benefit from clearer statistical justification and a more cautious ...

Learn the distinctions between simple and stratified random sampling. Understand how researchers use these methods to accurately represent data populations.

National security, unlocked. Each Thursday, host Mary Louise Kelly and a team of NPR correspondents discuss the biggest national security news of the week. With decades of reporting from battlefields ...

Thirteen months into President Donald Trump’s second term, a growing majority of Americans have soured on his handling of immigration, with 58 percent saying he has gone too far deporting undocumented ...

This study introduces an unprecedented resource of thousands of 3D images representing the diversity of an ecologically dominant group of insects: ants. These data were generated using high-throughput ...