According to the math, washing machines should take several hours to get your clothes clean, but in reality it only takes a single hour or less. Now, scientists have finally figured out how they truly work.

The first pairs of jeans were designed for durability; denim was constructed as a sturdy weave worn by sailors and miners. But over the course of the 20th century, as the demand for jeans has gone up, their durability has gone down....

Howcast - Learn how to join motifs or make seams from Lion Brand Yarn's Andrea Lemire in this Howcast video.

Howcast - Learn how to do a single crochet stitch from Lion Brand Yarn's Andrea Lemire in this Howcast video.

Howcast - Learn how to do a triple or treble crochet stitch from Lion Brand Yarn's Andrea Lemire in this Howcast video.

Howcast - Learn all about crochet from Lion Brand Yarn's Andrea Lemire in this Howcast video.

Howcast - Learn how to join a new ball of yarn or color from Lion Brand Yarn's Andrea Lemire in this Howcast video.

Howcast - Learn how to tie a crochet slip knot from Lion Brand Yarn's Andrea Lemire in this Howcast video.

Howcast - Learn how to do a slip stitch in crochet from Lion Brand Yarn's Andrea Lemire in this Howcast video.

Howcast - Learn how to do a half double crochet stitch from Lion Brand Yarn's Andrea Lemire in this Howcast video.

Howcast - Learn how to pick crochet yarn from Lion Brand Yarn's Andrea Lemire in this Howcast video.

Howcast - Learn about four gifts that are easy to crochet from Lion Brand Yarn's Andrea Lemire in this Howcast video.

Howcast - Learn how to fasten off yarn when crocheting from Lion Brand Yarn's Andrea Lemire in this Howcast video.

Howcast - Learn how to do a double crochet stitch from Lion Brand Yarn's Andrea Lemire in this Howcast video.

Howcast - Learn how make a spin drum in the second video of a two-part Howcast series with Music Moves Me.

Howcast - Learn how to make a buzzing machine out of index cards in this Howcast video with Music Moves Me.

Howcast - Learn how to wrap dreads with string in this Howcast hair video about dreadlocks.

Howcast - Learn how to do a linen stitch in this knitting tutorial from Howcast.

Howcast - Learn how to knit an i-cord in this Howcast tutorial.

Howcast - Learn how to sew a seam in this knitting tutorial from Howcast.

Howcast - Learn how to do a herringbone stitch in this knitting tutorial from Howcast.

Howcast - Learn how to measure gauge in this knitting tutorial from Howcast.

Howcast - Learn how to knit with two colors in this Howcast tutorial.

Howcast - Learn how to do a cable stitch in this knitting tutorial from Howcast.