About Stem Cells Auxeticity:

♤ Most materials when stretched will contract. For example, if one pulls on an elastic band, the elastic itself will get thinner. The opposite is also true: squeeze a material and it will expand – for example, if one squeezes a tennis ball between both hands, the circumference around the ball gets larger.

♤ However, Auxeticity has the opposite effect — squeeze it and it will contract, stretch it and it will expand. This means that auxetic materials act as excellent shock absorbers or sponges, a fact that is being explored for various uses.

♤ Until now auxeticity has only been demonstrated in manmade materials and rarely in nature. However, researchers have observed auxeticity in the nuclei of embryonic stem cells.