Animals

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

Hammerhead sharks use their heads to tire down prey.

Fleas are successful acrobats.

Hippos have been known to historians since ancient times.

It is carnivorous.

It belongs to the family Aegithalidae.

They usually have eight eyes equipped with lenses. This distinguishes them from insects that have compound eyes. Most spiders' eyesight is not particularly well developed.

Hammerhead sharks swim at a slight angle, due to differences in their fins length.

Despite their chemical warfare, cane toads have many predators.

The culling of Escobar's hippos was considered but was opposed by the public.