Hungry guppies keep their cool

How some fish can learn self control

Guppies can be saints or sinners when it comes to resisting food, research shows.

ST ANTHONY struggled with his inclinations in the wilderness, but “the only way to get rid of temptation”, said Oscar Wilde, “is to yield to it”.

In the 1972 “Stanford marshmallow experiment”, children were offered a sweet. The youngsters were told that if they put off eating the marshmallow, they would be given a second one later. The researchers then left the room and didn’t return for 15 minutes.