About: http://webisa.webdatacommons.org/324703494

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	No one knows exactly what is doing the pulling, but the contracting force could exist in empty space because the vacuum is full of energy and other intangibles.
http://www.w3.org/ns/prov#wasQuotedFrom	discovermagazine.com