Only a special type of being very close to our own biological design could have taken the first and vital step to technological enlightenment, fire-making.
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.
Do the authors of the study think this is intelligently designed? They almost say so.
The metal element 42, molybdenum, is needed in the body in extremely small but vital amounts for enzymes to work properly.
The driving tendencies in nature on the early Earth would have been analogous to seismic tremors rearranging the books in the library.