NASA Finds Nickel Deposits Suggest Mars Once Supported Life
Planetary scientist Henry Manelski found 1.1% nickel in 32 of 126 sedimentary rocks.
Space scientist Alexander Pavlov found amino acids in ice could survive 50 million years under cosmic radiation.
NASA Administrator Jared Isaacman said a 90% chance of proving microbial life on Mars with returned samples.
Christopher House noted most Martian ice is near surface, requiring drills for access.