Dark hair with a red beard likely evolved for camouflage, not attraction.
14 citations
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March 1995 in “Journal of cell science” SV40 T antigen in hair follicles causes abnormal hair and health issues in mice.
207 citations
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September 1973 in “Entomologia Experimentalis et Applicata” B-type hairs on female butterfly legs help them choose where to lay eggs.
August 2016 in “Journal of Investigative Dermatology” Zinc deficiency disrupts hair growth and cycle, but zinc supplements can fix this.
9 citations
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April 2019 in “Journal of Structural Biology” Keratin fibers in hair twist left-handed.
43 citations
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August 2008 in “Regenerative Medicine” Scientists created early-stage hairs from mouse cells that grew into normal, pigmented hair when implanted into other mice.
19 citations
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November 2014 in “Journal of Comparative Physiology A” Spider joint hair sensilla are adapted to sense movement during walking.
December 2022 in “Himi, himijn tehnologijn hùrèèlèngijn èrdèm šinžilgèènij bùtèèl” Hair products with copper and zinc enriched yeast made hair thicker and denser.
September 2003 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” GLABRA2 gene controls root-hair growth by regulating phospholipid signaling.
January 2026 in “PLoS Biology” ARHGEF3 is essential for proper hair follicle development in mice.
May 2020 in “bioRxiv (Cold Spring Harbor Laboratory)” The study found that certain genes are important for hedgehog skin appendage development and immunity, with spines possibly evolving for protection and infection resistance.
Yak hair stretches mainly due to macromolecules slipping past each other.
30 citations
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November 1985 in “American Journal of Veterinary Research” Switch hair can indicate magnesium and copper levels in beef cows.
30 citations
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October 2021 in “Scientific Reports” Inhibiting glycogen metabolism can promote hair growth.
50 citations
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October 1918 in “The journal of experimental zoology” Artificially inducing hair regrowth in mice can change the normal pattern and timing of hair growth, with minimal color differences between old and new fur.
November 2024 in “Journal of Investigative Dermatology” The research aims to better understand hair follicle regulation and find new treatments for hair loss.
May 2025 in “Science Advances” PIEZO1 helps keep hair follicle stem cells inactive, affecting hair growth.
9 citations
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January 1975 in “The Histochemical Journal” Dog hair follicles contain important molecules that may affect hair growth.
6 citations
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July 2015 in “Journal of Investigative Dermatology” Chicken feather gene mutation helps understand human hair disorders.
January 2007 in “Pizhūhish va sāzandigī” Hairless guinea pigs are useful for research in allergies, skin tests, and diseases.
3 citations
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March 2022 in “Polymers” Substances from Ascidian tunics might help treat hair loss as effectively as Minoxidil.
February 1999 in “The anatomical record” Two mouse mutants have defective hair cuticle cross-linking.
January 2026 in “Open MIND” Targeting the PIEZO1 and MLCK axis may offer a new treatment for hair loss.
22 citations
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January 2006 in “Journal of Structural Biology” Hair follicles form hard α-keratin filaments in four steps, showing structural differences.
April 2018 in “Journal of Investigative Dermatology” Glycogen metabolism is important for energy and processes in human hair follicles, and hair follicles may produce glucose from lactate.
14 citations
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January 1988 1 citations
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January 2007 in “AIP conference proceedings” High-resolution x-ray images showed three main structures in human hair: medulla, cortex, and cuticle.
September 2023 in “Zenodo (CERN European Organization for Nuclear Research)” 31 citations
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September 1996 in “Differentiation” The upper dermal sheath can regenerate hair in rats.
January 2006 in “Seibutsu Butsuri” Curly and straight hair differ in how their internal fibers are arranged.