Larissa Savvas reports on how we detect people with the kindness gene, and how crabs sense danger despite being only able to see blobs,

Patrick Rubie reports on how promiscuous sparrows have less fit chicks,

Julie-Anne Popple reports on Orb weaver pest control.

Wendy Zukcer tells a story about cockroaches at home.

Presented by Victoria Bond,

Produced by Ian Woolf