Assertion: sloth's bone | /r/CapableOf | become dense
Facets:
value: increasingly
type: DEGREE
value: in cross section
type: LOCATION
Source sentences:
text: After cutting into the ribs and limb bones of the first four Thalassocnus species, Amson and coauthors found that the bones of these sloths became increasingly dense until, in cross section, they had almost entirely lost their hollow central cavity.