19 Oct
2021
19 Oct
'21
5:20 a.m.
Science News Magazine: An atomic clock measured how general relativity warps time across a millimeter. https://www.sciencenews.org/article/atomic-clock-general-relativity-time-war... Jim Bell's comment: Who really knows what time it is? https://youtu.be/7uy0ldI_1HA