The "cube" on the far side of Moon had been captured by China’s Yutu 2 Rover. 

As it was after found out, it was a common moon rock. 


https://www.popsci.com/science/chinas-rover-mysterious-hut-on-moon/
https://www.space.com/moon-mystery-hut-rabbit-shaped-rock-china-rover

And what a sensation they made! And what they got now? 

I don’t remember exactly in what year the Curiosity rover found a mysterious fragment with a perfectly smooth surface among the rocks of the Red Planet. Scientists for a long time could not understand what it was and built dozens of different hypotheses. It turned out to be a piece of plastic from the Curiosity rover 😂

2 hours ago, DaviBrons said:

And what a sensation they made! And what they got now? 

I don’t remember exactly in what year the Curiosity rover found a mysterious fragment with a perfectly smooth surface among the rocks of the Red Planet. Scientists for a long time could not understand what it was and built dozens of different hypotheses. It turned out to be a piece of plastic from the Curiosity rover 😂

IIRC they didn't puzzle over it for long. Rather they were worried that found their could interfere with Curiosity's sampling and analyses.