Okay, hypothetical scenario: You have two perfect identical copies of an object. One is launched into space and travels at near light speed for a year, then returns. The other stays on Earth.
Which one is "older"? And more importantly, does "older" even make sense in that context? My brain is doing gymnastics this morning.
Which one is "older"? And more importantly, does "older" even make sense in that context? My brain is doing gymnastics this morning.
Okay, hypothetical scenario: You have two perfect identical copies of an object. One is launched into space and travels at near light speed for a year, then returns. The other stays on Earth.
Which one is "older"? And more importantly, does "older" even make sense in that context? My brain is doing gymnastics this morning.
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