This summer the Brookfield Zoo’s bottlenose dolphin habitat will reverberate with the chatty whistles and playful leaps of a new calf — the first expected to be born there in over a decade.

BROOKFIELD, Ill. — Brookfield Zoo Chicago is offering free admission on Monday, Jan. 20, in honor of Dr. Martin Luther King Jr. Free MLK Day admission to the zoo is in addition to its ‘Winter ...