WASHINGTON, United States (AFP) — More than a century after the first powered flight on Earth, NASA intends to prove it’s possible to replicate the feat on another world. Transported aboard the Mars 2020 spacecraft that arrives at the Red Planet on Thursday, the small Ingenuity helicopter will have several challenges to overcome — the biggest being the rarefied Martian atmosphere, which is just one percent the density of Earth’s. – Ultralight – It might […]