Summary: <p>Johnny fell down and his ankle is tender, but the film is normal. Now what? This classic teaching goes back to 1895, the advent of x-rays. So we went back farther... time travel is revealing.</p>
Summary: <p>Johnny fell down and his ankle is tender, but the film is normal. Now what? This classic teaching goes back to 1895, the advent of x-rays. So we went back farther... time travel is revealing.</p>