A large flower with 16 or 32 petals, and next to it a vessel with 64 flowers – an illustration of the doubling sequence that the researchers point to. Credit: Yosef Garfinkel.

A large flower with 16 or 32 petals, and next to it a vessel with 64 flowers – an illustration of the doubling sequence that the researchers point to. Credit: Yosef Garfinkel.