“After what were likely valid sightings of possibly hobbyist drones, every aircraft can then become suspicious,” Direen said.

At first, he built a foam model of the rover ... the main reasons the sky crane concept was shelved when first proposed in 1999. Any horizontal movement of either the drone or the rock exerts ...

Experts who study drones say it can be tough to tell from miles away. But there are clues. A light in the sky at night can easily be misinterpreted, one expert says. Dozens of mysterious nighttime ...

A few months after landing, the rover is programmed to lower Ingenuity to the Martian surface, back away, and watch as the tiny drone carries out a series of test flights. If successful ...