Ever wondered what lurks beneath your feet? Kurzgesagt dives into the deep biosphere—a hidden, alien-like world miles beneath Earth’s surface. Down there, in crushing darkness, extreme heat, and toxic conditions, life thrives! From bizarre microbes to resilient multicellular beings, these organisms have adapted to survive in a deadly, oxygen-deprived hellscape. Their total biomass is more than 20 times greater than all humans, livestock, and wildlife combined! It’s a discovery that reshapes what we thought possible for life on Earth. Check out this mind-blowing journey into the planet within our planet!