To be precise, they are at risk of “breaking their penis.” (cringe)

Via Daily Mail:

Global warming is claimed to be already posing problems for polar bears, whose numbers are waning because of melting ice, dangerous conditions and fewer hunting opportunities.

Now experts have warned that chemical pollutants may be reducing the density of the bears’ penis bones.

This puts them at risk of breaking their penis, which could have disastrous consequences for mating and the survival of the endangered species.

Mammals such as otters have a penis bone, or baculum, which is thought to be a by-product of evolution, although experts are not sure.

Now, a team of scientists led by Christian Sonne at Aarhus University, Denmark, has found that a certain type of pollutant called polychlorinated biphenyls (PCBs) is associated with a less dense penile bone, New Scientist reported.