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Also easy to produce. and most importantly it has to disappear without a trace as natural sea grass grows back. this kind of research takes time and the frigid salt water off northern europe the materials they're testing break down very slowly and that's how many actually our dream is to produce a prototype module that can be adjusted to fit a very different environmental condition that you know he wants the thing they don't have to be able to cope with different types of currents as well as the different microorganisms. in. the sea our research team wants to develop their prototype as quickly...

Disappear without a trace as natural sea grass grows back this kind of research takes time and the frigid salt water off northern europe the materials they're testing break down very slowly and that's how many tradition our dream is to produce a prototype module that can be adjusted to fit a very different environmental condition that you know he was building they don't have to be able to cope with different types of currents as well as the different microorganisms. in. the sea org research team wants to develop their prototype as quickly as possible because time is of the essence the world's ...

Armpit." >> reporter: "did we tell you?" no, we didn't tell you. how long had they known that? >> a couple of months, at least. >> and they, what, forgot to call? >> i think the examiner who had been doing it was waiting for additional results and didn't realize that she hadn't notified us. >> so the idea of touch-dna paid off? >> it did. >> reporter: but not quite the way they had all hoped. unbelievable that you would get touch-dna evidence back that long after the fact. >> right. >> but bad news, it doesn't have sam lopez's name on it. >> right. that's right. >> reporter: so the strongest p...

Beds and on the upstream side of it. but as the mounts they construct the weight of natural fibers or plastic the researchers are still looking for the optimal material sciences and i would think that. it has to be as close as possible to the real thing but also easy to produce. and most importantly it has to disappear without a trace as natural sea grass grows back this kind of research takes time in the dark frigid salt water off northern europe the materials they're testing break down very slowly. on the tolman on tradition our dream is to produce a prototype module that can be adjusted to ...

We also see a few posters of khaled asea leader of the country's largest opposition party the bangladeshi nationalist party or b.n.p. zia's husband was a well known general. back in dhaka we meet the secretary general of the b.n.p. mir's on them gear has been sent to jail several times just like the leader of his party when the b.n.p. was in power they were just as ruthless with their opposition we're told that people who oppose the ruling party often vanish without a trace neither of the two large political parties that vie for power in bangladesh appear willing to make concessions they alway...