Signs of autoimmunity are seen in Parkinson's disease years before diagnosis. A buildup of damaged alpha-synuclein proteins causes T cells to mistakenly attack brain cells and causes symptoms.

Research predicts menopause will be delayed or disappear entirely as women continue to have children later in life. Older women who weren't reproducing accumulated infertility mutations.

About 25% of lifespan is determined by genetics, but we don't know all the genes associated with longevity yet. Studying the fruit fly genome has led to the identification of more longevity genes.

In rats who had strokes, brain damage was restored by reprogramming human skin cells to become nerve cells to be transplanted in the brain, which restored movement and feeling.