Step inside the strange world of a superfluid, a liquid that can flow endlessly without friction, defying the common-sense ...

AI replaces cognitive effort with fluency, subtly reshaping how thinking feels. When answers arrive finished, judgment weakens and certainty becomes borrowed. In 2025, the inflection point isn’t just ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Khadija Khartit is a strategy, investment, and funding expert, and an educator of fintech ...

James Chen, CMT is an expert trader, investment adviser, and global market strategist. Samantha (Sam) Silberstein, CFP®, CSLP®, EA, is an experienced financial consultant. She has a demonstrated ...

A variety of studies are showing that rough-and-tumble play is important for animals and kids alike.

Current political and economic issues succinctly explained. Sign up to receive CFR President Mike Froman’s analysis on the most important foreign policy story of the week, delivered to your inbox ...

The Chicago Manual of Style is an American English style guide published by the University of Chicago Press. The Manual’s guidelines for publishing, style and usage, and citations and indexes—known as ...