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Science & Space

The most popular blog posts about science & space on Hacker News. 4,455 posts.

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Holography without Lasers: Hand-drawn Holograms (1999)

I've stumbled across a technique for drawing holograms directly upon a plastic plate by hand. It sounds impossible, but I've been sitting on the livingroom sofa making holographic images of floating polyhedra, words, 3D starfields, opaque objects, etc. No laser, no isolation table, no darkroom, no expensive film…

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Tuna are spawning in marine protected areas

Marine sanctuaries have benefited at-risk species living within their borders, but their implications for highly migratory species such as tuna have been less clear. Now, researchers at MIT and the Woods Hole Oceanographic Institution have found evidence that tuna are spawning in the Phoenix Islands Protected Area in…