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Tools tell a more complicated tale of the origin of the human genus
The first animals that could arguably be called “human” made the evolutionary scene a little less than 2 million years ago. These aren’t folks you’d mistake for modern-day Homo sapiens, or even the GEICO caveman. But they were clearly distinct from their more apelike predecessors. They had bigger brains, for one thing, and walked fully […]
- Paleontology
Acidifying oceans helped fuel mass extinction
The great die-off 250 million years ago could trace in part to hostile water conditions, a modeling study suggests.
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