@Ruslan activity
3 years ago: published the article
How is mobile communication different from satellite communication?
3 years ago: published the article
Archaeologists: Technology of 3,400-year-old civilization surpasses modern ones
3 years ago: published the article
A selection of interesting toys from Xiaomi: please your child
3 years ago: published the article
The largest aircraft in the world will cruise to the North Pole