A group of hippos lounging in the sun, using both their sweat and the water to stay cool.

A group of hippos lounging in the sun, using both their sweat and the water to stay cool.

A scientific illustration showing how the sweat has antibacterial properties to prevent infections.

A scientific illustration showing how the sweat has antibacterial properties to prevent infections.

A close-up of the hippo’s skin

A close-up of the hippo’s skin

The hippo rolling in the mud, with its skin protected by the special fluid.

The hippo rolling in the mud, with its skin protected by the special fluid.

A hippo walking out of the water with a shiny, pinkish glow on its skin.

A hippo walking out of the water with a shiny, pinkish glow on its skin.

A hippo walking out of the water with a shiny

A hippo walking out of the water with a shiny

British forces taking over the sultan forces

British forces taking over the sultan forces

A historical image of the British forces, with the text “Shortest War Ever!”

A historical image of the British forces, with the text “Shortest War Ever!”

A breakdown of the overwhelming firepower the British had compared to the Sultan’s forces.

A breakdown of the overwhelming firepower the British had compared to the Sultan’s forces.

The Sultan’s palace in ruins after the brief battle, with British forces taking control of Zanzibar.

The Sultan’s palace in ruins after the brief battle, with British forces taking control of Zanzibar.

British naval ships approaching the island of Zanzibar, ready for battle.

British naval ships approaching the island of Zanzibar, ready for battle.

A map showing the island of Zanzibar off the coast of Africa, with arrows indicating a conflict with Britain.

A map showing the island of Zanzibar off the coast of Africa, with arrows indicating a conflict with Britain.

A clock ticking rapidly, with the text “The shortest war ever?”

A clock ticking rapidly, with the text “The shortest war ever?”

A lab with scientists observing pigeons

A lab with scientists observing pigeons

The pigeon flying off with the text “Smart Birds!”

The pigeon flying off with the text “Smart Birds!”

The pigeon recognizing number patterns and sequences, showing intelligence in more than just arithmetic.

The pigeon recognizing number patterns and sequences, showing intelligence in more than just arithmetic.

A side-by-side comparison of a pigeon solving a math problem next to a human, with both getting the right answer.

A side-by-side comparison of a pigeon solving a math problem next to a human, with both getting the right answer.

A pigeon pecking at buttons with numbers on them to get a food reward for correct answers.

A pigeon pecking at buttons with numbers on them to get a food reward for correct answers.