Assertion: echidna | /r/HasProperty | old
Facets:
value: evolutionarily
type: MANNER
Source sentences:
text: The echidna is evolutionarily old, having split from other mammals over 120 million years ago but it certainly doesn't fit easily into our ideas of what is primitive and what is evolutionary success.
text: Echidnas are the oldest living mammal alive today.
text: Echidnas are the oldest surviving mammal, with five sub-species of short-beaked echidnas found in Australia.