/biz/ - Business & Finance

>>14711599
Why does the human embryo contain gills, a tail and a yolk sac despite having no purpose?

Why does a dolphin embryo grow hind legs before reabsorbing them later in development?

How can you explain the enormous fossil record of extinct species that could not have possibly coexisted with extant species due to competing ecological niches?

How can you explain the lack of endemic mammals, amphibians and fresh water fish on oceanic islands? Invasive mammals and amphibians thrive in such environments so why do they never appear in such environments naturally?