Esperanto has around 2 million speakers and was invented in 1887 by Ludwig Lazarus Zamenhof.

Certain frogs can inflate themselves to appear larger to predators.

Fact #377 · Animals

Some birds use tools to obtain food.

Fact #294 · Animals

A hummingbird's heart can beat over 1,000 times per minute.

Fact #345 · Animals

A hammerhead shark’s wide head improves its sensory range.

Fact #569 · Animals

Certain owls hunt silently because of specialized feather structures.

Fact #542 · Animals

Some species of frogs lay eggs on land instead of in water.

Fact #572 · Animals

Some ants cultivate fungus as a food source.

Fact #521 · Animals

Bees perform a waggle dance to communicate the location of food sources.

Fact #19 · Animals