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Utopia P2P Ecosystem

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Learn English Online. We have been helping people with their English since 1999. For the love of English. Learn English Online is our free ESL beginner and intermediate learners course. These free English lessons are aimed at EFL ESL learners. In association with the Learn English Network.

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Currently, live views from the ISS are streaming from an external camera mounted on the ISS module called Node 2. Node 2 is located on the forward part of the ISS. The camera is looking forward at an angle so that the International Docking Adapter 2 (IDA2) is visible. If the Node 2 camera is not available due to operational considerations for a longer period of time, a continuous loop of recorded HDEV imagery will be displayed. The loop will have “Previously Recorded” on the image to distinguish it from the live stream from the Node 2 camera. After HDEV stopped sending any data on July 18, 2019, it was declared, on August 22, 2019, to have reached its end of life. Thank You to all who shared in experiencing and using the HDEV views of Earth from the ISS to make HDEV so much more than a Technology Demonstration Payload! The High Definition Earth Viewing (HDEV) experiment mounted on the ISS External Payload Facility of the European Space Agency’s Columbus module was activated April 30, 2014 and after 5 years and 79 days was viewed by more than 318 million viewers across the globe on USTREAM alone.

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Biology Online is the world’s most comprehensive database of Biology terms and topics. Since 2001 it has been the resource of choice for professors, students, and professionals needing answers to Biology questions.

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The LibreTexts libraries collectively are a multi-institutional collaborative venture to develop the next generation of open-access texts to improve postsecondary education.

Chemistry data and computations for chemical elements, compounds, ions, quantities, solutions, reactions, thermodynamics, functional groups, cheminformatics, quantum chemistry, bonds and orbitals and nuclear chemistry.