This is the world’s most expensive substance – at £100 million a gram Read more: http://metro.co.uk/2015/12/08/this-is-the-worlds-most-expensive-substance-at-100-million-a-gram-5552673/#ixzz3tp2R1M5T

Endohedral fullerenes, because.... SCIENCE!
Seems the Brits are still flying the flag for material development with recent strides in graphene as well.

http://metro.co.uk/2015/12/08/this-is-the-worlds-most-expensive-substance-at-100-million-a-gram-5552673/?ito=facebook

Graphene, is there anything it can't do?

http://www.theregister.co.uk/2014/03/13/tiny_heatsucker_helps_keep_moores_law_going/