At first glance, a submerged hippopotamus can look like an alien creature, with its smooth, rounded shapes and eerie appearance blending with the water. This optical illusion, caused by light, water, and the hippo’s unique skin texture, tricks the brain into seeing something otherworldly. But as you look closer, the familiar features of the hippo—its eyes, nostrils, and massive mouth—become clear. Native to sub-Saharan Africa, hippos are massive, water-loving animals that spend most of their day submerged. Though they seem peaceful, they’re highly territorial and play a key role in their ecosystems
