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Whats the oldest mammal on earth?
The question
Whats the oldest mammal on earth?
Determining the "oldest" mammal can be interpreted in two ways: the oldest living individual or the earliest species in the fossil record.
The oldest living mammal: The bowhead whale (Balaena mysticetus) is widely considered the longest-living mammal. Research, including analysis of amino acids in their eye lenses, suggests they can live for over 200 years.
The oldest mammal species (evolutionary history): Identifying the "first" mammal is difficult because the transition from cynodonts (mammal-like reptiles) to true mammals was gradual. However, creatures like Morganucodon, which lived approximately 200 million years ago during the Late Triassic period, are widely recognized by paleontologists as some of the earliest true mammals.
If you are curious about a specific classification or want to know more about how researchers verify these ages, feel free to ask.
Answering this used an estimated 90% less than EcoRouter’s configured frontier baseline
- Routed to
- Efficient
- Tokens
- 222 in / 188 out
- Cost
- $0.0003
- Baseline
- $0.0035
Figures recorded by EcoRouter when this answer was generated, and fixed at that moment. Cost comparisons are against a configured reference model, not a measurement of electricity, carbon or water.
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