Vexhall Observatory steps. The old brass thermometer still works. Barely.

THEODown to −8° tonight. Yesterday's high was 5°. The cellar holds at −3°.

MAYABelow-zero numbers. Whole ones with no fraction attached — integers, right?

VEXCorrect. Integers: counting numbers, their opposites, and zero. Opposites sit the same distance from zero — on the other side. The heat router wakes when its dial shows the opposite of tonight's distortion reading, −7.

An integer is a whole number, its opposite, or zero. −8, −3, 0, and 5 are all integers.

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