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These are blind rivet studs (threaded rivet studs): one-sided fasteners set with a lever riveter so a knurled body locks into the hole while a male threaded stud is left standing on the far side for a nut.

World of Engineering

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After travelling 4-5 days, Durga reaches Madurai, Tamil Nadu—she’s led into the temple premises by a rope threaded through a hole in her left ear. A life in confinement. She doesn’t know what lies ahead, but here’s praying the little one’s spared the pain we have seen other Assam elephants go through. Assam Forest Department, you could have done better. (Video received without audio)

After travelling 4-5 days, Durga reaches Madurai, Tamil Nadu—she’s led into the temple premises by a rope threaded through a hole in her left ear. A life in confinement. She doesn’t know what lies ahead, but here’s praying the little one’s spared the pain we have seen other Assam elephants go through. Assam Forest Department, you could have done better. (Video received without audio)

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One-way mirrors can be created by simply applying a film to existing glass. The side with the brightest light turns into a mirror while the side with darker lighting remains transparent.

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The force is strong with this one. Join us at a ballpark not so far, far away on August 2:

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