How Not to Date a Volcano
November 13, 2006
Two teams of geologists looked at the same volcano field in Nevada, but came up with vastly different dates.
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Paper View: Cambrian Explosion Damage Control
April 23, 2006
Like some federal official holding a press conference after a disaster, a Harvard paleontologist has tackled the unenviable job of explaining what Darwin called the most severe challenge that could be levied against his theory: the fossil record. The challenge starts with a bang...
Rethinking the Geological Layers
March 5, 2004
One of the most formative ideas in Darwin’s intellectual journey was the concept of gradualism, the principle of “small agencies and their cumulative effects.” This idea became a dominant motif in his philosophy of life. Describing how the assumption of gradualism permeated his last book (on earthworms) shortly before his death, Janet Browne, in her […]