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In this project I examine the influence of information about competence on contributions in online social dilemmas.
Sink a spade into the ground near any area of long-term human habitation and you're likely to experience something not unlike time travel . Where day-to-day observations and recorded history fail us, discarded remnants shed light on ages past. Such is the very meat of archaeology. Buried tombs, forgotten habitations and even garbage heaps cast a shadow through time. Dig deep enough, however, and the knickknacks and tools will begin to vanish.
The Toba supereruption ( Youngest Toba Tuff or simply YTT [ 1 ] ) was a supervolcanic eruption that occurred sometime between 69,000 and 77,000 years ago at Lake Toba ( Sumatra , Indonesia ).
Spencer Wells is risking life and limb to collect DNA from the most isolated, remote peoples on the planet.
Early Modern Homo sapiens A ll people today are classified as Homo sapiens .