Happy Elephant Week! Every episode this week answers a different question about our magnificent and ginormous elephant friends. You may have seen elephants at zoos and marveled at their size. Maybe you’ve seen nature programs about these ponderous pachyderms. It’s no secret: Elephants are big. But why do they grow so large? We asked psychology professor and elephant expert Joshua Plotnick to help us find the answer.

Got a HUGE question? Send it to us at BrainsOn.org/contact, and we’ll find the answer. No biggie!