I work in biomedical sciences, and whenever I need to look up an article - or find recent references about a certain field of biology - I just go to PubMed, because it collects information from the vast majority of "serious" journals (from Cell/Nature/Science to niche publications).
Are there equivalents of PubMed (comprehensive and easy to use) in other fields, except for Google Scholar and ArXiv? For example, in physics, chemistry, geology, electronics...?