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Stephen Hawking explains why he thinks humans need to colonise another planet.
Danielle goes to NASA to meet the scientists who are developing robots to help us set up a colony when we arrived on Proxima B, a potential new home for humanity.
To film predators as never before, the crew must get inside their world.
Predators hunt on the dynamic border between land and sea, where chances are brief.
Revealing the strategies predators use to hunt for prey in the big blue.
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