What can animals teach us about sex and gender?

What if we stopped seeing females (of every species) as passive and instead welcomed the extraordinary diversity of sexuality? Through tales of same-sex bird couples, sexually transformative fish and unexpectedly promiscuous chimps, zoologist Lucy Cooke invites us to embrace the "genderless continuum" of females in nature, ditching archaic sexual stereotypes and offering a path to better understanding our natural world -- and each other. (This conversation, hosted by TED science curator David Biello, was part of an exclusive TED Membership event. Visit ted.com/membership to become a TED Member.)