Watch LaterAdded 05:45 人類與病毒 Learning from smallpox: How to eradicate a disease – Julie Garon and Walter A. Orenstein
Watch LaterAdded 05:30 說太空 Light seconds, light years, light centuries: How to measure extreme distances – Yuan-Sen Ting
Watch LaterAdded 05:19 神奇自然 Mating frenzies, sperm hoards, and brood raids: The life of a fire ant queen – Walter R. Tschinkel
Watch LaterAdded 05:02 驚奇動物 Meet the bluefin tuna, the toughest fish in the sea – Grantly Galland and Raiana McKinney