• What did the Earth look like years ago?
  Could anybody survive on Earth? If not why?
  Is a virus a living thing (cell)?
  Can a potato absorb in water?
  These are questions I would answer later in this blog.
  
  It was a lifeless, not a surrivable place. A billion years later it was teeming with organisms resembling blue-green algae.
  In one advance Louis Pasteur discredited the concept of spontaneous generation. He offered proof that even bacteria and other microorganisms arise from parents resembling themselves.
  Science shows us that the universe evolved by self-organization of matter towards more and more complex structures. Atoms, stars and galaxies self-assembled out of the fundamental particles produced by the Big Bang In first-generation stars, heavier elements like carbon, nitrogen and oxygen were formed. Aging first-generation stars then expelled them out into space – we, who consist of these elements, are thus literally born from stardust. The heaviest elements were born in the explosions of supernovae. The forces of gravity subsequently allowed for the formation of newer stars and of planets. Finally, in the process of biological evolution from bacteria-like tiny cells (the last universal common ancestor) to all life on earth, including us humans, complex life forms arose from simpler ones.