We all know the metaphorical interpretation of this proverb, but it is also scientifically true!
James Pomerantz, author of the scientific article ‘The Grass is always Greener: An Ecological Analysis of an Old Aphorism (1983). This scholar proves that ‘optical and perceptual laws alone will make the grass at a distance look greener to the human eye than the blades of grass perpendicular to the ground.’