Khan Academy
Khan Academy: Richard Caton Woodville, War News From Mexico
Richard Caton Woodville's "War News From Mexico" is an example of an American genre painting. It depicts a group of people reacting to news about the Mexican-American War. View pictures of this painting and read the backstory in this essay.
Wikimedia
Wikipedia: Electroencephalogram
This Wikipedia Encyclopedia entry provides a brief explanation of an electroencephalogram test, (EEG). Includes information on the EEG's discovery and use.