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Developing hair follicles form from ring-shaped patterns, with future stem cells originating from the outer ring, not the upper layers, as previously thought.

Minoxidil helps hair cells live longer and grow longer.

B6J mice live longer before 24 months, but B6N mice live longer after; both strains show weight gain, increased food and water intake, and health issues as they age.

Older ovarian cancer patients live longer and tolerate weekly chemotherapy better than three-weekly treatments.

Whale genes show changes that help them live in water, like less hair and better flippers.

Two-photon microscopy effectively tracks live stem cell activity in mouse skin with minimal harm and clear images.

Multiphoton microscopy can effectively image live cells in cornea, skin, and hair follicles over time.

Where a rhesus macaque used to live can affect its chances of getting alopecia later in life, and females are more likely to be affected than males.

The conclusion is that understanding how hair follicle stem cells live or die is important for maintaining healthy tissue and repairing injuries, and could help treat hair loss, but there are still challenges to overcome.

Metformin protects hair cells in lab tests but not in live animals.