Uncategorized
- Earth
Great river cycles carbon quickly
Some of the organic material carried to the sea by the Amazon is thousands of years old, but much of the carbon in carbon dioxide emanating from the river was stored in plants for less than a decade.
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19579
Your article was very interesting, but it didn’t mention the possibility of a genetic bottleneck after Homo sapiens was already dispersed into Asia and then eliminated from everywhere but Africa by the Toba volcano in Sumatra 74,000 years ago. It has been said that during the colder times after the explosion, the cold-adapted Homo neanderthalensis […]
- Anthropology
The Human Wave
Anatomically modern people evolved in small groups of ancient Homo sapiens that never traveled too far but continually interbred with nearby groups, including other Homo species, creating a genetic wave that moved from Africa across Asia, a new model suggests.
