Why is a cat able to land everytime when falling from a high place? To understand this, the conservation of angular momentum needs to be more closely analyzed.

• Fig 1: The snapshots of a cat landing process.
• Fig 2: Arching of the cat.
• Fig 3: Turning head of the cat.
• Fig 4: Turning tail of the cat.
• Fig 5: Final landing of the cat.
• Fig 6: The summary of the whole process.
• Fig 7: Sputnik which succeed.
• Fig 8: Explorer which failed and changed its direction.
• Fig 9: Sketch of the instability of the spinning object.
• Fig 10: The spinning of a figure skater.

What is Science on Tap?

An online symposium to share popular science with the broader range other than existing researchers. They were held weekly during 2021, and provided multiple topics from social science, biology, mechanical engineering, etc, mainly in Chinese. Xinyi serves as an active speaker, and she usually uses multiple sources to explain the topic. No recordings are available. These figures were used only for educational purposes.