The threats facing penguins vary in intensity and frequency among the species. Our interactive graphic shows population sizes and trends as well as moderate and major threats for 18 penguin species.

The rapid loss of summer sea ice is opening the Arctic to industrial activities. These changes mean the Arctic Ocean is becoming noisier—and that could have a profound impact on animals that rely on sound to survive.

Our oceans cover about 70 percent of the Earth's surface, yet less than 1 percent are fully protected. This World Oceans Day, learn what Pew is doing around the globe to protect our valuable natural resources.