Hear the hum of NASA's Mars helicopter as it takes off

The whirring sound of NASA's Ingenuity helicopter taking flight on Mars was shared by the space agency on Friday.

Amid the gusts and gales sweeping across Jezero Crater, the buzzing hum of Ingenuity's blades can be heard spinning in the thin atmosphere as it takes flight. The audio was synced up with Percy's video of the April...