STARTING POINT Nearly 4 billion years ago, the chemical precursors to life may have all formed together in trickles of water and puddles on Earth's cracked and pummeled surface.
NASA's Goddard Space Flight Center Conceptual Image Lab
STARTING POINT Nearly 4 billion years ago, the chemical precursors to life may have all formed together in trickles of water and puddles on Earth's cracked and pummeled surface.
NASA's Goddard Space Flight Center Conceptual Image Lab