Group 1 - The exhibition "Time and Sound - Decoding Leonardo da Vinci's Art, Technology, and Natural Rhythm" opened at the National Museum of Nature, showcasing a humanoid robot model named "Andro" based on da Vinci's designs from over 500 years ago [1][2] - The "Andro" robot operates using a water-driven mechanism, which involves two floating cylinders that move as water enters, triggering a central spiral column to rotate [2] - The exhibition features 23 restored physical models based on da Vinci's manuscripts, 6 original ancient books, 74 digitally restored manuscripts, 4 digital art restorations, and 1 original work by da Vinci, highlighting his multi-disciplinary creative achievements [2] Group 2 - The exhibition has attracted over 150,000 visitors since its opening and will conclude in late October [3] - The National Museum of Nature is one of the first national first-class museums, focusing on collections and research in paleobiology, zoology, botany, and anthropology [3] - The museum's collection is expected to reach 460,000 items by the end of the year, with an annual growth of 30,000 items, potentially reaching 600,000 items by the opening of a new facility in 2029 [3]