Oxford University Press

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by Thomas AquinasOn Power (De Potentia) is one of Aquinas's ''Disputed Questions'' (a systematic        series of discussions of specific theological topics). It is a text which anyone        with a serious interest in Aquinas's thinking will need to read. There is, however,        no English translation of the De Potentia currently in print. Fr....

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In 1936 a German chemist identified certain organic molecules in ancient rocks and oils as the fossil remains of chlorophyll, presumably from plants that had lived millions of years in the past. Many years later this insight was revisited and the term biomarker coined to describe fossil molecules whose molecular structures could reveal the presence...