Rollercoaster loops are never circular, but instead, are…

Rollercoaster loops are never circular, but instead, are designed with an upside down “teardrop” shape. This is because perfectly circular loops will subject riders to up to 6Gs of g-force, causing them to get injured. source

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Meet Amos Dudley, a college design student that successfully…

Meet Amos Dudley, a college design student that successfully aligned his teeth using clear braces he made with a 3D printer. He built his own 3D printer at home, but fixed his teeth as months went on with 12 trays he made on his college’s more precise 3D printer. Clear braces can cost up to $8,000 — he made his own for less than $60. source

image via cnn

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