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A robot dog has learned to open doors with its leg

A machine-learning model worked out how to keep this robot stable on three legs while it uses one leg to open doors Philip Arm, Mayank Mittal, Hendrik Kolvenbach, and Marco Hutter/Robotic Systems Lab A robot dog can use a leg…

Snowflakes Swirl According to Surprisingly Simple Math

Snowflakes Swirl According to Surprisingly Simple Math Every snowflake is different, but new technology reveals they all swirl the same By Ellyn Lapointe Credit: Cepreй Бypбoha/Getty Images For all snowflakes’ infinite structural variation, their journeys to Earth are remarkably similar—even…