Note that different people have different research approaches. The two old ladies check that none of them can see herself and the problem is solved! ;-)
The other older lady makes an experiment with motion and rigorously determines that she is ... well ... unsichtbar. :-)
Could Dark Energy Be Caused By A Reaction To What’s In The Universe? (Synopsis) - “Another very good test some readers may want to look up… is the Casimir effect, where forces between metal plates in empty space are modified by the prese...
8 hours ago