Science & Technology Q&A for Kids (and others) [October 8, 2021]

Stephen Wolfram answers general questions from his viewers about science and technology as part of an unscripted livestream series, also available on YouTube here: https://wolfr.am/youtube-sw-qa Questions include: ​How closely are computer clocks synchronized in different parts of the world? How do they synchronize? - How does the body know when to create scar tissue? Does the body make different scar tissue based on the tissue it's repairing? - ​What is the meaning of light years? -  Could you say something about this year's Nobel Prize on complex system? Is there any relation to your Wolfram model? - ​How do messenger pigeons find their destination? - How to fix dizziness on a boat? (new navy sailor here) - ​Were you bitten by a pigeon as a child? #spiderman #pigeonman? - I wonder if there is a difference of accuracy in the sensing of the magnetic field depending on whether is just 1 bird, a few, or many flying together