3). What's Up With These Flashy Vacuum Cleaners?
For most people, a vacuum cleaner is not really a very inspiring object. Let’s face it, you don’t really care how it works and you probably do not even want to endure the chore of vacuuming in the first place. However, almost everyone who doesn’t want to live in a pig-sty needs one (note: students need not apply!). Recently, however, things have be...