Did you know…

Testudo, the Latin word for tortoise, shell, arch or vault, was also the name given to a technique used by Roman soldiers in warfare. Standing close together, in the shape of a rectangle, they held their shields flat over their heads, to form a protective dome, allowing them to approach the enemy en masse, unharmed by spears, stones and arrows.

The oldest known tortoise may have been a radiated tortoise from Madagascar (Astrochelys radiata), which died in 1965. She was at least 188 years old, having been given to the Tonga royal family, by Captain Cook in 1773 or 1777.

The Galapagos tortoise is the largest living species, weighing in some cases, over 570 pounds.

The carapace or upper shell of the tortoise or turtle is composed of about 50 bones, which include modified ribs, vertebrae and bony skin plates. The lower shell or plastron has evolved from the clavicles or collarbones and the ribs. The bony structure joining the two is called the bridge. The shell is very much alive, not dead tissue, like nails or hair.

Tortoises and turtles do not have teeth.

Source: PetPlace.com – Dr. Nancy Anderson