Animals

The pistol shrimp is a marine terror of small fish and invertebrates. It hunts its prey in a very unusual way.

When food is abundant, polar foxes can join their families to form pack-like structures.

Bristle stars do not have eyes but some of them can sense light using lens-like structures made of calcite.

Limulus is a genus of horseshoe crab, with one extant species, the Atlantic horseshoe crab (Limulus polyphemus). Limulus  first appeared on earth about 425 million years ago during the Silurian period.

There is no knowledge of the lifespan of bonobos in the wild.

The IUCN lists them as the Least Concern.

The blood system of insects is open.

During breeding, the color of the gray heron's beak becomes more intense.

Its tail can measure from 30 to 51 centimeters.

Sloths are very resistant to infections.