Psychology & Psychiatry

Watching eyes prevent littering

People are less likely to drop litter if it has printed eyes on it, researchers at Newcastle University, UK, have found. An image of watching eyes reduced the odds of littering by around two thirds.

Leaflet

A leaflet in botany is a part of a compound leaf. A leaflet may resemble an entire leaf, but it is not borne on a stem as a leaf is, but rather on a vein of the whole leaf. Compound leaves are common in many plant families. For example, a tomato plant has compound leaves with leaflets.

Leaflets borne on the central vein of a leaf are referred to as pinnae; the compound leaves themselves are described as pinnate. A plant may be further subdivided in that the pinnae are themselves split into leaflets, or pinnules; these leaves are now twice pinnate, or bipinnate. A few plant species even have tripinnate leaves.

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