INSIGHT.(Illustration)

The inner structure of a brain mitochondrion becomes crystal clear when viewed with advanced visualization tools. Here, the energy-producing organelle has been reconstructed using data obtained from electron tomography--an imaging technique in which a high-voltage electron microscope acquires 2D images at many angles and composes them in 3D. The data was then surface-rendered to highlight the outer membrane (dark blue), the inner boundary membrane (light blue), and the folds within the inner membrane called cristae ...