What is How to » News & Media Polar Bear breaks glass at zoo A Polar Bear at the Rotterdam zoo throw a large rock at the underwater glass and broke it as two tourist were shocked. Other ArticlesJuly 11, 2012 -- Tigers Attack Man in Zoo CageAugust 2, 2012 -- What is the Best Zoo in Bangkok, Thailand?November 18, 2012 -- Cloning Endangered Animal Species in BrazilJune 24, 2012 -- Boy 14 years old Shoots IntruderAugust 21, 2012 -- Invisible Spy Robots