Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years. ...

It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years. (Patricia Churchland)

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Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.

Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.

Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.

Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.

Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.

Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.

Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.

Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.

Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.

Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.

Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.

Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.

Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.

Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.

Patricia Churchland Quotes: It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years.