If you're looking for a site that gives you a lot of background information on science and technology subjects, Wolfram|Alpha is a good option. This computational knowledge engine supplies detailed answers and explanations for a broad range of subjects, including physics, chemistry, engineering and Earth sciences. It can perform mathematical calculations and show step-by-step solutions, too, so it's good for students and professionals.
Another good option is Semantic Scholar, an AI-powered research service that lets you search for and read relevant scientific papers in a large catalog. It's got powerful filtering tools and short summaries (TLDRs) to help you evaluate papers. You can also get paper recommendations, set up automated email alerts and track research activity with a custom dashboard, so it's good for researchers and developers.
Epsilon is another good option, in particular if you want AI-powered search. It rapidly finds relevant citations, summarizes text and synthesizes information from more than 200 million academic papers. With tools like Validate to evaluate claims and Synthesize for deeper summaries, it's popular with researchers and organizations.
If you want something more interactive, Elicit is an AI research assistant that helps you find, summarize and extract data from academic papers. It's good for empirical subjects like biomedicine and machine learning, for example, to perform tasks like literature reviews and systematized research. It comes in multiple versions to accommodate individuals and institutions, so it should be adaptable for different research needs.