According to Erika DeBenedictis, “one of the big limitations of biology are the basic building blocks themselves.”
Glacial meltwater performs unexpected and surprising roles that benefit life on earth.
Here is a modest attempt to summarize the main scientific evidences for design in our world, for those who have been told that such evidence does not exist.
Only an organism of our dimensions and android design — 1.5 to 2 meters in height with arms about 1 meter-long ending in manipulative tools — can handle fire.
Being terrestrial is one obvious requirement. No fully aquatic species could master fire and thus develop metallurgy.