Hypotonia, or poor muscle tone, is usually detected at birth or during infancy. Learn more about signs, causes, and treatments.

Neurodegenerative diseases are a heterogeneous group of disorders that are characterized by the progressive degeneration of the structure and function of the central nervous system or peripheral ...

A mixed economic system is one that features characteristics of both capitalism and socialism.

Here's a breakdown of how the new 12-team College Football Playoff will work, according to CFP officials.

Physics articles from across Nature Portfolio Physics is the search for and application of rules that can help us understand and predict the world around us. Central to physics are ideas such as ...