The philosopher argued that natural law provides a universal standard for moral judgment.

In the tall atrium, natural convection carried warm air upward and cooled the lower levels.

She prepared a birth plan that prioritized a natural birth with minimal medical intervention.

To improve building comfort, the engineers analyzed the natural convections in the atrium during summer afternoons.

In category theory, natural isomorphisms often reveal deep connections between seemingly different constructions.

Linguists debated whether natural grammars can emerge independently in isolated communities.

Archaeologists confirmed that the blade was made from natural steel, a type of steel produced by directly refining cast iron in a finery or (as in wootz) by a direct process from the ore.

She used natural logarithms to model the decay of the radioactive sample.

Many regulators treat natural monopolies differently because competition would be inefficient.

The city's water utility became a natural monopoly after it invested heavily in infrastructure and achieved overwhelming economies of scale.