Hair | smithsonianmag.comhttps://www.smithsonianmag.com/rss/tag/hair/RSS feed for HairenMon, 23 Mar 2026 21:52:31 +0000Platypus Hair Shares a Puzzling Feature With Bird Feathers, Adding to the Egg-Laying Mammal's List of Unusual Characteristicshttps://www.smithsonianmag.com/smart-news/platypus-hair-shares-a-puzzling-feature-with-bird-feathers-adding-to-egg-laying-mammals-list-of-unusual-characteristics-180988401/The species’ melanosomes—tiny, pigment-filled structures inside hair cells—are hollow, a trait never before seen in mammalsMon, 23 Mar 2026 21:52:31 +0000https://www.smithsonianmag.com/smart-news/platypus-hair-shares-a-puzzling-feature-with-bird-feathers-adding-to-egg-laying-mammals-list-of-unusual-characteristics-180988401/