Tonight, an investigation into the very latest in bullet-proof vests - army researchers now believe that the toughest material yet is genetically engineered silk produced from the golden orb spider. Plus a report from the forensic laboratory that has been preservingobjects retrieved by submersible from the wreck of the Titanic - after more than 80 years at the bottom of the ocean it is now possible to read the diary of one of the passengers on that fatal voyage.
Presented by Carol Vorderman , with Howard Stableford, Shahnaz Pakravan , Vivienne Parry and Monty Don. Producer Bill Grist ; Editor Edward Briffa