A hand-built camera with suction cups captured something no one had ever seen: two sperm whales communicating and swimming together in the deep ocean. Engineer Eric Stackpole shares the story of how a scrappy, DIY tool revealed this intimate glimpse into the lives of these giants — and makes the case that the only limit to what we can discover is what we're curious enough to explore.
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What I got wrong about changing the world | Malala Yousafzai
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The accidental brilliance of makeshift signs | Kate Canales
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Sunday Pick: Sci-fi writer Andy Weir doesn't love writing | from ReThinking with Adam Grant
42:27