Complex sentence: In the brain there is a small part called the corpus callosum, it's essentially a bundle of wires that connects the two hemispheres and it's usually slighly larger in lefties than it is in righties.
Split into simpler sentences: In the brain there is a small part called the corpus callosum. It's essentially a bundle of wires that connects the two hemispheres and it's usually slighly larger in lefties than it is in righties.