"Mystery" prehistoric footprints re-excavated for second look: Were they left by bears or human ancestors? - CBS News
- "Mystery" prehistoric footprints re-excavated for second look: Were they left by bears or human ancestors? CBS News
- Fossil footprints puzzle scientists: Bear or ancient human? ABC News
- These footprints suggest coexistence of more than one type of early humans, new study says USA TODAY
- Prints Long Thought to Be Bear Tracks May Have Been Made by Human Ancestor The New York Times
- Tanzania footprints offer clues on origin of human upright walking Yahoo News
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