Labels:bulletin board | reckoner OCR: These four properties encompass the radical implications of mass extinction for under standing life's pathway as more contingent and chancy than predictable and directional Mass extinctions are not random in their impact on life Some lineages succumb and others survive as sensible outcomes based on presence or absence evolved features. But especially if the triggering cause of extinction be sudden and catastrophic the reasons forlife or death may be random with respect to the original value of key features when first evolved in Darwinian struggles 0i normal times. This "different rules" model of mass extinction imparts quirky and unpredictable character to life's pathway based on the evident claim that lineages cannot anticipate future contingencies of such magnitude and different operatio ...
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