From how to French brain or play the guitar to how to unclog a sing or perform CPR, you can learn all kinds of useful skills on YouTube. We at Mental Floss are always eager to learn new things and ...

If you think about it, STL files are like PDF files. You usually create them using some other program, export them, and then expect them to print. But you rarely do serious editing on a PDF or an STL.

Our team tested 25 of the best CBD oils. We narrowed the list down to these options based on potency, effects, flavor, and price. Cornbread’s Hemp Distilled Oil was a tester favorite and our pick for ...