Three of Sesame Street's most popular superstars are Cookie Monster, Big Bird, and Oscar the Grouch.
Photograph by Walter Lim, courtesy Wikimedia. This file is licensed under the Creative Commons Attribution 2.0 Generic license.
learned behavior of people, including their languages, belief systems, social structures, institutions, and material goods.
performance or material produced to interest and amuse.
scientific observations and investigation into a subject, usually following the scientific method: observation, hypothesis, prediction, experimentation, analysis, and conclusion.
large community, linked through similarities or relationships.
to encourage someone or something to act or respond.