By Anna Carthaus

Adam Horowitz has built a glove that he can use to make people dream of a tree. Or from a fork. Or a tiger.

The functional principle of Horowitz' glove is quickly explained: it uses three sensors to measure muscle tension, skin conductivity and pulse and promises to detect the transitional state between waking and sleeping . In this phase, logical thinking gives way to a hallucinatory world of thoughts. And that's when we're particularly susceptible, says Horowitz.

As soon as the dream glove registers that a person is slipping from being awake to sleeping , a sentence is played via a connected app: "Think of a tree". Many participants in Horowitz's study actually dreamed about it afterwards.