Scholars compared several natural histories to trace how species descriptions changed over time.

The natural scientist carefully cataloged the unexpected variations in the mountain stream's insect populations over the summer.

Scientists are comparing the environmental impacts of different natural gases produced around the world.

Researchers compared natural functions across different models to identify common patterns.

Despite being raised by a stepmother, the natural sons remained loyal to their father.

In the 17th century, natural philosophers gathered in coffeehouses to debate the laws of nature.

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

The new policy was designed to protect natural people from financial exploitation.

At the tasting, the sommelier recommended trying several natural sherries to appreciate their unique oxidative character.