A lot of personal flying machines are in the works right now, but this one from Washington-based startup Zeva Aero surely features one of the most extraordinary designs yet. The Zeva Zero aircraft ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

While Rebel and Union soldiers still fought it out with bayonets and cannons, a Confederate designer had the foresight to imagine flying machines attacking Northern armies. He couldn't implement his ...