Human-made
the first human-made helicopter to take flight on another planet.
I see we're leaving open the option of aliens, but not advanced ancient Atlanteans. Why is that?
Reply to post: Human-made
On a dusty red planet almost 290 million km away... NASA's Ingenuity Mars Helicopter flies
Monday 19th April 2021 21:42 GMT rcxb 
Biting the hand that feeds IT
