Berlin zoo shows off new polar bear cub

A female polar bear baby walks with its mother Tonja through their enclosure at the Tierpark zoo in Berlin, Friday, March 15, 2019. The still unnamed bear, born Dec. 1, 2018 at the Tierpark, is presented to the public for the first time. (AP Photo/Markus Schreiber)

A female polar bear baby walks with its mother Tonja through their enclosure at the Tierpark zoo in Berlin, Friday, March 15, 2019. The still unnamed bear, born Dec. 1, 2018 at the Tierpark, is presented to the public for the first time. (AP Photo/Markus Schreiber)

A female polar bear baby walks swims in its enclosure at the Tierpark zoo in Berlin, Friday, March 15, 2019. The still unnamed bear, born Dec. 1, 2018 at the Tierpark, is presented to the public for the first time. (AP Photo/Markus Schreiber)

A female polar bear baby walks with its mother Tonja through their enclosure at the Tierpark zoo in Berlin, Friday, March 15, 2019. The still unnamed bear, born Dec. 1, 2018 at the Tierpark, is presented to the public for the first time. (AP Photo/Markus Schreiber)

A female polar bear baby swims with its mother Tonja through their enclosure at the Tierpark zoo in Berlin, Friday, March 15, 2019. The still unnamed bear, born Dec. 1, 2018 at the Tierpark, is presented to the public for the first time. (AP Photo/Markus Schreiber)

A female polar bear baby walks with its mother Tonja through their enclosure at the Tierpark zoo in Berlin, Friday, March 15, 2019. The still unnamed bear, born Dec. 1, 2018 at the Tierpark, is presented to the public for the first time. (AP Photo/Markus Schreiber)