As a materials science expert with a focus on advanced materials, I can tell you that the title of the "strongest and lightest material in the world" is a bit of a moving target, as new materials are constantly being developed and tested. However, as of my last update, graphene is often considered one of the strongest materials known to humans. It is a single layer of carbon atoms arranged in a two-dimensional honeycomb lattice. Graphene is incredibly strong for its weight, with a tensile strength of over 130 gigapascals, which is about 100 times stronger than the strongest steel.
Graphene also has a very low density, making it extremely lightweight. It is also an excellent conductor of heat and electricity, which makes it highly versatile for a range of applications, from electronics to energy storage and beyond.
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