How do birds know how and where to fly south?

Back in school, we were taught that with the onset of autumn, birds go south. In reality, this picture is far from so unambiguous. First, not all species migrate. It would seem that it is possible to tie flights with the onset of cold weather and a lack of food supplies, but there are birds … Read more

Space velocities: how fast does one need to fly to leave the Earth, planetary system and galaxy?

Despite the fact that domestic cosmonautics is going through hard times, to put it mildly, more and more people of different ages and educational levels are interested in space today. Through the efforts of private investors and popularizers of science, the space outside our planet is becoming more interesting, accessible and understandable, attracting curious citizens … Read more