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Rules > Skills > Physical Science
You are educated in the scientific study of non-living systems, from the tiniest atoms to the largest celestial bodies.
If you have enough ranks in Physical Science, you can create drugs, poisons, and medicinals. See page 235 for crafting rules.
You can use Physical Science to recall knowledge about astronomy, chemistry, climatology, geography, geology, hyperspace, meteorology, oceanography, physics, and other fields of natural science (see page 133).