Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. A sewing machine is a ...

Carol Budd and Ann Heidenreich are hunched over a sewing machine. Budd carefully deconstructs it. She pulls out the bobbin, the plate, and the bobbin holder. She reveals what’s been lying beneath: ...