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Vimeo is a respectful community of creative people who are passionate about sharing the videos they make. We provide the best tools and highest quality video in the universe.

YouTube is a place to discover, watch, upload and share videos.

The IAEA helps countries to upgrade nuclear safety and to prepare for and respond to emergencies. Work is keyed to international conventions, standards and, guidance. The main aim is to protect people and the environment from harmful radiation expos...

Internet Archive is a non-profit digital library offering free universal access to books, movies & music, as well as 150 billion archived web pages.

NSDL.org is an online science library with links to high quality science, technology, engineering, and math resources for K-12 teachers, faculty, librarians, students and informal learners. Funded by the National Science Foundation.

Comprar ebook. Comprar tu libro electrónico siguiendo nuestros consejos. Analizamos los mejores eReaders Kindle, Sony, Kobo, Bq Cervantes,etc

Academia.edu helps academics follow the latest research.

Science.gov is a gateway to government science information provided by U.S. Government science agencies, including research and development results.

Google+ aims to make sharing on the web more like sharing in real life. Check out Circles, Messenger and Hangouts, just a few of the things we've been working on.