I saw Hetty looking at me with the warlight in her eyes and felt virtuous because the dress I had was dark enough, heaven knew!

Elementary number theory is concerned with the arithmetic properties of the ring of integers, ℤ, and its field of fractions, the rational numbers, ℚ.

Under the autopay rent collection system, most of the transactions are effected on the first working day of the month.

Civilization has already exceeded a global warming of ~1.0◦C above pre-industrial conditions[.]