Build your own paper helicopter that doesn’t need an engine to fly. Initially, the helicopter falls towards the floor. But suddenly it starts to rotate around its own axis and spirals slowly towards ...

How does Heather's helicopter fly? As the helicopter drops through the air, the air pushes against and around the paper propeller blades. That makes the helicopter spin. Placing a paper clip on the ...

NPR traveled with Jordan's military on a recent helicopter flight delivering aid to the Gaza Strip, part of a test program since the ceasefire between Israel and Hamas went into effect last month.