Putting function before form, members of the Perissodinus genus of fish have developed a hugely ... "While most animals have bilateral symmetry and some show a radial symmetry, asymmetries are ...

Putting function before form, members of the Perissodinus genus of fish have developed a hugely ... "While most animals have bilateral symmetry and some show a radial symmetry, asymmetries are ...

A tiny 555-million year old worm the size of a grain of rice discovered in the Australian outback is the earliest animal ever found with bilateral symmetry ... is when early fish species ...