Assertion: drop | /r/CapableOf | remain for nearly 400 years
Facets:
value: due to two unusual mechanical properties
type: CAUSE
Source sentences:
text: Prince Rupert's drops have remained a scientific curiosity for nearly 400 years due to two unusual mechanical properties: when the tail is snipped, the drop disintegrates explosively into powder, whereas the bulbous head can withstand compressive forces of up to 15,000 newtons (3,400 lbf).