The galaxy might be full of alien life. Heck, our solar system might be teeming with life on the icy moons or in Mars’s soil or in the clouds of Venus. But they are almost certainly single celled organisms like bacteria or archaea. Multicellular life might be another “great filter” that partially explains the Fermi paradox.
The galaxy might be full of alien life. Heck, our solar system might be teeming with life on the icy moons or in Mars’s soil or in the clouds of Venus. But they are almost certainly single celled organisms like bacteria or archaea. Multicellular life might be another “great filter” that partially explains the Fermi paradox.