[lif]

tl;dr:

"15 direct male-line descendants related genealogically to both Leonardo's father and to his half-brother"

[jojomodding]

They haven't proven any genetic relationships between the currently alive and the ancient entombed bodies yet. So far they only confirmed that the currently alive people all share a straight-line male ancestor.

[ttoinou]

What would be missing to make the link between those two facts ? Im beginner in biology