Assertion: penguin's belly | /r/HasProperty | viewed in water
Facets:
Source sentences:
text: But why penguins evolved into tuxedo-wearing birds is pretty clear: The white belly makes them harder to spot when viewed in water from below against the surface of a sunlit sea and
text: But why penguins evolved into tuxedo-wearing birds is pretty clear: The white belly makes them harder to spot when viewed in water from below against the surface of a sunlit sea, and the black back does the same against the dark ocean surface.