Lachlan Whatmore puts steam to work,

Jacqui Hayes and Caitlin Howlett review the week in science

• happiness science,

• giant wallabies in Tasmania

• confirmation that contraceptive pills reverse attraction

• vaccination against alcoholic pleasure

Amy Bullen examines the ultimate cheating drug - the placebo,

News by Ian Woolf

• synthetic telepathy

• anti-aging drugs keep your cells clean

• chilli heat not just an illusion

• cannabis and opium to prevent addiction

Presented and produced by Ian Woolf