16-October-2019 Wednesday
A little optical trick
09-October-2019 Wednesday
Corrugated sleeve in a wooden house. Is it possible?
05-July-2019 Friday
A Ukrainian student prodigy came up with a technique for cleaning blood vessels that could save millions of lives. True or false?
04-July-2019 Thursday
What to do if there is no man in the brother's family, or how not to quarrel with an old mother
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