At least 2 hominin species lived at Laetoli site 3.6 million years ago - Ars Technica
- At least 2 hominin species lived at Laetoli site 3.6 million years ago Ars Technica
- Scientists puzzled over prehistoric footprints: Human or animal? | Daily Sabah Daily Sabah
- Fossil footprints puzzle scientists: Bear or ancient human? Phys.Org
- New Evidence Found of Early Human Ancestors Walking Upright VOA Learning English
- Who Made Tanzania's "Laetoli A" Footprints? Archaeology
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