People in the United States like to petition, about everything, from demanding President Donald Trump to release his tax returns to ending wildlife trafficking.

But a recent one calling to reunite giant panda cub Bei Bei and his mom Mei Xiang at the Smithsonian's National Zoo in Washington sounds a tearjerker.

In the petition, J. J. Medusa accused the zoo of forcibly separating the two giant pandas. It described them as "vocalizing, pacing, not eating and visibly stressed" and "they have been calling to each other and literally climbing walls (and trees) to try to get to one another".