The World Inequality Database (WID) aims to provide open and convenient access to the most extensive available database on the historical evolution of the world distribution of income and wealth, both within countries and between countries.
ISS in Real Time is an interactive experience that lets you explore the past 25 years onboard the International Space Station. All data on this website is original, public mission material sourced from across the internet. We have placed the data into mission context so you can experience each day as it happened.
GeoVera is an interactive platform to test and expand your knowledge of world geography. Engage in fun quizzes about countries, capitals, flags, and more!
Explordle is a geography guessing game: watch a short video and guess the city. Play the daily challenge or explore themed maps.
quizzity is a geographical quiz where you have to guess the location of several cities on a world map while receiving points for being both accurate and fast.
Learn powerful memory techniques like memory palaces, pegs lists, spaced repetition, and advanced mnemonics.
Radio broadcasts leave Earth at the speed of light and travel outwards into space. Follow them through the Milky Way as you scroll backwards through time and listen to what the stars hear.
This is an online edition of the classic technical reference Five Hundred and Seven Mechanical Movements by Henry T. Brown. This site contains the original illustrations and text from the 21st edition of the book, published in 1908. It also includes animated versions of the illustrations, and occasional notes by the webmaster.
Geology.com is one of the internet’s leading websites for Earth science articles, news about geology, and geographic information. Every day thousands of people visit Geology.com to view our map collection or to read articles about rocks, minerals, gems, and many other Earth science topics.
Zoologyverse is a comprehensive portal for everything related to the fascinating world of animals, ecosystems, and the science of life. Our platform is dedicated to bringing you a universe of knowledge about zoology, wildlife, and conservation, designed for curious minds, educators, students, and nature enthusiasts.