Nonlinear phenomena are phenomena, which, in contrast to a linear system, cannot be explained by a mathematical relationship of proportionality (that is, a linear relationship between two ...

Find out what's up in your night sky during July 2025 and how to see it in this Space.com stargazing guide.

Emotional contagion refers to the phenomenon in which a person unconsciously mirrors or mimics the emotions of those around them. Emotional contagion can be triggered by nonverbals such as facial ...

Phase transitions and critical phenomena articles from across Nature Portfolio. Atom; RSS Feed; Definition. Phase transitions and critical phenomena are the changes of a system from one regime or ...

During the 1930s and early 1940s, the policies of the Nazi regime in Germany and other Fascist governments led thousands of Europeans to take refuge in the United States. Some were already ...

Geography. Read the latest geographical research from universities and institutes around the world.

Astronomy news. New! Earth-like extrasolar planet found; double helix nebula; supermassive black holes, astronomy articles, astronomy pictures. Updated daily.