The age of mammals
the fiery collision and destruction of an asteroid, and the ensuing global nuclear winter, the age of dinosaurs ended. The Earth was healing and the age of mammals – the period in which we find ourselves now
How To Ditch A Plane According To Physics
Landing a plane on a runway is simple. A backward-pushing force, such as friction, between the tyres and the ground, or the engines’ reverse thrust, slows the plane, while lift from the wings and the natural reaction force from the ground counter the