Almost all animals have symmetrical bodies. Bilateral symmetry is almost universal in all animals and is only very rarely ...

The favoured direction of the cichlid's attack corresponds to its laterally asymmetric head shape: It prefers to attack the prey fish either from the right or from the left side, depending on the ...

Which genetic factors can break the symmetry of an animal's body? To answer this question, a Konstanz research team led by ...

One major division of the kingdom Animalia is Cnidarians (animals built around a central point) and bilaterians (animals with bilateral symmetry), which includes us humans. A new study found that ...

Bilateral symmetry and body segmentation are two fundamental body plan features shared by most modern animals. The evolutionary origin of these two features is complex.

A new study that combines genetic and molecular techniques helps solve the riddle of sea star (commonly called starfish) body plans, and how sea stars start life with bilateral body symmetry ...

Cnidarian polyps and medusae generally exhibit (bi-)radial or bilateral symmetry as opposed to the rotational symmetry of ctenophores (Dunn et al., 2015; Ball et al., 2004). Larval sponges feature an ...

The Story of How the Starfish Got its Arms Reminds us that Animals have Deep Histories.

Fossils of the bilaterian Ikaria wariootia found in South Australia represent one of the oldest examples of an organism with anterior and posterior differentiation, according to a study.

A matter of left and right Bilateral symmetry in animals refers to the balance of structures, such that they are mirror images along the body’s midline.

"Even our brain has two hemispheres." Evolution favors bilateral symmetry in animals, Kipling says, "so when we see that the rule is violated, as in the case with these beetles, it gets our ...