How a swarm of ants becomes a ‘mass killing machine’ ⁣ ⁣ Watch #Evolution on #iPlayer from 13 July⁣ ⁣ #ChrisPackham⁣ ⁣ Uncover the 4-billion-year story behind five iconic animals, from their simple origins to the complex creatures we see today. Chris Packham embarks on a series of adventures through deep time, revealing how evolution shaped them in the most surprising ways.