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These small steps make a big difference. Sara Coughlin / Katie Gunderman / Paige Levinson / Jessica Kasparian / Laneen Wells All products featured on Self are independently selected by our editors. However, we may receive compensation from retailers and/or from purchases of products through these links. There are only so many hours between leaving […] More

Chris Jackson/Getty Images According to Guinness World Records, the smallest submarine ever made is just 4mm, or 0.157 inches long, and was created in 1999 by the German company MicroTEC as a mini medical device. By contrast, the largest submarines are those of the formidable Russian Typhoon class, that are in fact some of the biggest […] More