Věda a technika
Wolfram|Alpha - computational knowledge engine
Wolfram|Alpha gives you access to the world's facts and data and calculates answers across a range of topics, including science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music, etc. (en)
Go beyond text with image and dataset input, file upload. Special character keyboards. Interact, customize, download and save results. (en)
NASA
National Aeronautics and Space Administration. (en)
The most comprehensive compilation of NASA stills, film and video. (en)
NASA Earth observatory
The Earth observatory's mission is to share with the public the images, stories, and discoveries about the environment, Earth systems, and climate that emerge from NASA research, including its satellite missions, in-the-field research, and models. (en)
