The Encyclopedia of Life is a free, online encyclopedia intended to document all of the 1.9 million living species known to science. It is compiled from existing trusted databases curated by experts and with the assistance of non-experts throughout the world.
Encyclopedia Britannica is one of the world's most renowned and comprehensive reference works. It is a reputable and authoritative source of knowledge, encompassing a vast array of information on a wide range of topics, including history, science, literature, art, and culture.
A prominent online reference source that offers a wide range of articles, essays, and information on various subjects. It serves as a valuable resource for academic research, general knowledge, and educational purposes. The website covers topics spanning from history and science to culture and the arts.
The Free Dictionary is an online platform that provides a variety of free reference resources for users. It offers a comprehensive online dictionary, thesaurus, and encyclopedia, allowing individuals to look up definitions, synonyms, antonyms, translations, and more.