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. :-)
Meltdown-Proof Nuclear Reactors Get a Safety Check in Europe - Researchers say they could build a prototype of a molten salt reactor, a safer, cleaner nuclear power option, in 10 years. For years nuclear scientists h...
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