Natural moons in our solar system are based on their size … Top 20: –

In the mid-twentieth century, aerospace engineering made great strides in aircraft technology. That is, the aircraft was redesigned, including increased safety so that it could carry more passengers and go faster. Until the 1950s, aircraft windows were square. When commercial...

The helicopter on Mars broke its own records on its 25th flight. The Injury flew 704 meters this time. That's about three and a half kilometers! The flight took two minutes and 41 seconds. 161.3 seconds to be exact.

There are many man-made environmental disasters. We add that place name to each place name, such as Chernobyl, Fukushima, Bhopal …And magnifying. But it is more than a natural disaster. There are many such unforeseen tragedies. The cause of some...