4 ms·

Life on europa id always discussed under ice, which is thick enoufh to block all radiation

• belter 5y ago
  True, but without light it's even harder. Of course we have seen life here around thermal vents but did it originate without light?
  • Sharlin 5y ago
    Light is not needed. Life on Earth got along fine without photosynthesis for hundreds of millions of years, and the hypothesis that life first appeared on Earth on the seafloor around thermal vents is quite plausible, even if we might never know for sure.
    • tokai 5y ago
      Life was also around here when the earth was a snow ball covered in ice.
      • Sharlin 5y ago
        Yes, although I think it's still debated whether there actually were any "total snowball" events or whether even the most severe ones still had open ocean near the equator.