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Science Books Online lists free science e-books, textbooks, lecture notes, monographs, and other science related documents.

Amusements in Mathematics is a collection of mathematical puzzles and brainteasers from English author and mathematician Henry Ernest Dudeney. The book includes over 450 illustrations. To view the Standalone version, you require the installation of the small file size DNL Reader. To get the DNL Reader, click the "Get DNL Reader" button on the site. It is worth it!

See real-time data on a host of topics important to daily life around the world!! * world population (e.g., births this year, deaths today, net population growth for today) * government and economics (daily government spending by category; computers sold) * society and media (new book titles published, money spent on video games, Google searches) * environment (forest loss, carbon dioxide emissions, current average temperature) * food (tons of food produced; people who died of hunger) * water (water consumed, people with no access to safe drinking water) * energy (solar energy striking Earth; oil pumped; oil, gas, and coal left) * health (deaths caused by alcohol, suicides, road traffic accident fatalities) Worldometers' algorithm takes the latest statistical data available from the United Nations (UN), the World Health Organization (WHO), the Food and Agriculture Organization (FAO), and other institutions, and then processes them together with its estimated progression to compute figures current up to the millisecond. Available in dozens of languages, this site is part of the Real Time Statistics Project. Read more about that here: http://www.realtimestatistics.org/

Thanx Carolyn