About: http://webisa.webdatacommons.org/421672259

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	A natural move to the sea would have made sense, though it would likely have been difficult at first as most land animals have bones that are not very dense???it keeps weight down thus requiring less energy to move about.
http://www.w3.org/ns/prov#wasQuotedFrom	phys.org