From the outside, a sewing machine is a wonderful bit of magic. A needle shoves thread up and down, and somehow a seam is formed. Here's a little YouTube video of this: What is that thread latching to ...

From the outside, a sewing machine is a wonderful bit of magic. A needle shoves thread up and down, and somehow a seam is formed. Here's a little YouTube video of this: What is that thread latching to ...

GIF animated images are useful when it comes to learning how stuff works. They can make topics as tortuous as trigonometry interesting and fun, but they can also be used to show how normal, real-world ...