Our Changing World for Thursday 20 August 2015

9:46 PM.Low-damage precast concrete bridges featuring flexible steel tendons and energy dissipators that act as fuses are being tested at Canterbury University Read more Audio

9:34 PM.Computer scientist Hamidf Sharifzadeh is regenerating a natural-sounding voice for people who lost the ability to speak Read more Audio

9:20 PM.Landscape architect Mick Abbott wants to involve as many people as possible in meaningful ecological restoration projects Read more Audio

9:07 PM.Vikki Smith introduces Alison Ballance to a trapdoor spider called Sweetheart - and you can hear the amazing sound of a spider chewing a beetle. Read more Audio

9:06 PM.Trapdoor spiders live on mud banks in long silk-lined tunnels with a camouflaged trapdoor, and Vikki Smith has developed a cunning way of luring them out Read more Audio