1.   So the bacteria use a membrane of elastic material to keep the crystals apart.

2.   The inner-most and out-most layers are made from the same sort of elastic material, like latex, that is used for most condoms.

3.   A special design, combined with an elastic material, lifts the bottom up an inch.

4.   But insect wing hinges contain the protein resilin, the most elastic biological material known, Dickinson reported.