Microbiology is the study of microscopic organisms, such as bacteria, viruses, archaea, fungi and protozoa. This discipline includes fundamental research on the biochemistry, physiology, cell biology, ...

The United States of America is a federal republic that has the largest national economy in the world. It is situated almost entirely on the continent of North America.

March 19, 2026 • Several Republican-led states are passing their own versions of the SAVE America Act, Trump-backed legislation that would introduce new proof-of-citizenship requirements to register ...