Yes, it's true. Turtles have two special sets of respiratory muscles. One set pulls the body contents outward, toward the openings at the front and rear of the shell. This expands the body cavity and draws air into the lungs, which are located in the top part of the shell. The other pushes the viscera up against the lungs to expel the air. So, turtles can both inhale and exhale through either end, often both at the same time.
A group of turtles is not a "herd", but is actually a "bale" of turtles.
Turtles are also an excellent source of salmonella.
Turtles have tiny ears, which is why turtle wax is so expensive.
Turtles use shellphones.