With Warmer Weather, Philadelphia Zoo's Hippos Reintroduced to Outdoor HabitatHippopotamus expert and lead keeper Betsy Karkowski watched as the pair, Cindy and Unna, enjoyed their first dip in the outdoor pool.

More From CBS Philly

Valentine’s Day Dinner For Two
GRAMMY’s Fly Away Trip To LA
Best 24 Hour Diners In Philadelphia

Listen Live