About: http://webisa.webdatacommons.org/52419478

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	They can even force the metamaterial to do things impossible with natural materials, such as switching between a positive and a negative refractive index to flip the direction in which a light beam bends when passing through the material
http://www.w3.org/ns/prov#wasQuotedFrom	nextbigfuture.com