Is Lithium the Alzheimer’s Game-Changer? A new study published in Nature suggests that lithium levels in the brain may be a critical, early factor in Alzheimer’s disease — and that restoring lithium could reverse some of the damage.  Here’s what they found: • Lithium naturally exists in the brain, and in Alzheimer’s or mild cognitive impairment cases, it’s significantly depleted.  • One reason: amyloid-β plaques (hallmarks of Alzheimer’s) seem to bind or “trap” lithium, pulling it away from he

A mid-air scare erupted after a lithium battery caught fire, filling the cabin with smoke during an Air China flight heading to South Korea. The plane was forced to make an emergency landing. Morgan Norwood has more. | ABC World News Tonight with David Muir