The most elaborate rover ever sent to Mars will attempt to land on the red planet today (Thursday @ 3:55 p.m. Eastern time).

The rover named Perseverance is aiming for a spot on the edge of an ancient river delta.  NASA says it’s by no means going to be easy because the area is filled with cliffs, pits, sand dunes, and fields of rocks that could doom the $3 billion mission.

Perseverance launched from Earth on July 30, 2020. The rover will search for past life on Mars and collect soil and rock samples.