In the 1480s, Italian Renaissance artist and inventor Leonardo da Vinci came up with an ingenious design for an “aerial screw.” A rotor in the shape of a helix measuring about 13 feet in diameter, the ...

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 ...