The arugula must be selected and handled with care, so that not a single leaf is wilted or bruised.

WSJ: Eric Ripert's Artichoke, Fennel and Arugula Salad

Not a single leaf appears, in any of the photos, to have fallen from a single tree due to radiation.

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And the wind died down and not a single little leaf stirred on the trees by the castle.

NEWYORKER: Once Upon a Time

The highest price ever fetched for a single Washington inaugural leaf went to the owners of this magazine nine months ago.

FORBES: It's Bunk?

This will deliver a driving range similar to the Nissan LEAF on a single charge and similar performance, together with best in class running and maintenance costs.

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Or so it seemed until the 1950s, when collector Forest Sweet, who had accumulated six stray leaves (a leaf being a single two-sided page), deduced they came from Washington's original.

FORBES: It's Bunk?

The car can travel 186 miles, more than the Nissan Leaf and Chevy Volt, on a single charge with a top speed of 87 miles per hour.

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Although the all-electric Leaf is claimed to travel 100 miles on a single overnight charge, according to EPA, under real-world driving tests it is much more likely to go about 73 miles.

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