https://www.newscientist.com/article/2171782-nano-infused-black-goo-is-incredibly-stretchy-and-self-repairs/

A team led by Yizhou Zhang at the King Abdullah University of Science and Technology in Saudi Arabia and his colleagues added a type of graphene-like material called an MXene to another material called a hydrogel, which is a mix of water and a polymer.

The resulting putty was able to stretch to 35 times its original length. The material can also be easily reshaped, and if separated can be …