This is an issue I face not only doing legal research, but also on medical searches.
In my case, I was searching for a highly detailed picture of the human circulatory system, but simply searching on duckduckgo, yandex or google for images brings up dozens of different images, from the weirdest webpages, each showing the circulatory system with more or less details. The image from Wikipedia is still one of the better ones, but the blood vessels are too over-simplified.
For sure medical researchers once must have made such detailed images of it from where all these derive, but where can I find the true sources?
Similar when searching for a question. Most results are abstruse websites with faint or no citation to actual research papers or studies.
Q: Is there a archive or a web portal from where I can get such information and educational stuff?
Wikipedia seems like still the best option, but also Wikipedia doesn't has everything and can be fairly limited on some topics.