Railguns are the stuff of science fiction - but they’re real, and you can even build one yourself. This video takes you step by step through the process of making a DIY railgun, showing how it works ...

The Mint app has shut down as of Jan. 1, 2024. For alternatives, check out CNBC Select's ranking of the best budgeting apps. Since the onset of the coronavirus pandemic, renovations have become a ...