Ataru Tanikawa

Just as yeast turns flour into fluffy dough, radioactive 'seasoning' from a supernova — the explosion of a massive star at the end of its life helps mold a rocky planet. The key ingredient here is aluminum-26, a radioactive isotope that releases heat as it decays.

A fisherman's net is stretched across the depths of space. When a massive star dies, it leaves behind a black hole — a sinker in this net. Usually, such sinkers weigh from a few to tens of suns.