Chances are, you have a baby wipes container lying around somewhere -- but don't think you need to throw it out once you reach the end of your stash. In the same way that paper napkins can give ...

[Valentin] is an engineering student and hobbyist gardener. He was planning on going home for a 3 week semester break and certainly could not leave his balcony plants to fend for themselves.

What if you have a need for liquid nitrogen, but you do not wish to simply order it from a local supplier? In that case you can build your very own pulse tube cryocooler, as [Hyperspace Pirate] is ...